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Hydrogen
|elName=Hydrogen '''Hydrogen''' is a [[Chemical elements|chemical element]], typically found as a [[gas]

20 KB (3,081 words) - 21:57, 31 March 2022
Hydrogen bond
...thin green lines from the molecule in the center of the picture represent hydrogen bonds.}} .... Although stronger than most other [[intermolecular force]]s, the typical hydrogen bond is much weaker than both the [[ionic bond]] and the [[covalent bond]].

12 KB (1,827 words) - 17:00, 7 March 2024
Hydrogen-like atom
...tary charge]]. A better—but never used—name would therefore be hydrogen-like [[cation]]s. ...on orbital#atomic orbital|atomic orbitals]]. The orbitals of the different hydrogen-like atoms differ from one another in one respect only: they depend on the

19 KB (2,981 words) - 18:31, 3 November 2021
Hydrogen bomb

26 bytes (3 words) - 12:48, 4 June 2011
Hydrogen/Definition

136 bytes (19 words) - 13:13, 6 July 2008
Hydrogen/Electronegativity
Hydrogen's electronegativity is 2.1<ref>http://old.iupac.org/goldbook/E01990.pdf</re

193 bytes (22 words) - 16:26, 13 June 2008
Potential hydrogen

16 bytes (2 words) - 14:07, 9 October 2007
Hydrogen bonds
#REDIRECT [[Hydrogen bond]]

27 bytes (3 words) - 11:50, 15 July 2008
Hydrogen sulfide
#REDIRECT [[Hydrogen sulphide]]

31 bytes (3 words) - 09:27, 6 March 2024
Hydrogen/Properties

12 bytes (1 word) - 16:11, 27 June 2008
Hydrogen/Approval

12 bytes (1 word) - 16:54, 3 November 2007
Hydrogen sulphide
{{Image|Hydrogen sulfide.png|right|150px|}} ...fide'') is a [[chemical compound]] with the [[chemical formula|formula]] [[Hydrogen|H]]2[[Sulphur|S]]. It is a colourless, highly toxic, flammable [

6 KB (862 words) - 09:35, 6 March 2024
Hydrogen/Isotopes
|+ Isotopes of Hydrogen and Their Properties

441 bytes (54 words) - 10:25, 2 May 2008
Hydrogen sulphide/Definition
A [[chemical compound]] with the [[chemical formula|formula]] [[Hydrogen|H]]2[[Sulphur|S]], which is a colorless, highly toxic, flammabl

226 bytes (30 words) - 09:47, 6 March 2024
Hydrogen bond/Definition
...nd|covalent]] and non-[[Ionic bond|ionic]] [[chemical bond]] involving a [[hydrogen]] [[atom]] and either [[Fluorine]], [[Nitrogen]], or [[Oxygen]].

203 bytes (25 words) - 23:44, 16 July 2008
Hydrogen/Boiling point

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Hydrogen/Atomic mass

104 bytes (12 words) - 15:23, 17 May 2010
Hydrogen/Atomic number

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Nuclear fusion/Definition
...ergy. In a hydrogen bomb, fusion of deuterium and tritium (two isotopes of hydrogen) releases four times as much energy as the same mass of uranium in a fissio

224 bytes (40 words) - 11:25, 23 May 2023
Hydrogen-like atom/Definition
An [[atom]], excluding [[hydrogen]] itself, with only one electron, having charge +(Z-1), where Z = atomic nu

150 bytes (19 words) - 11:34, 13 July 2008
Hydrogen bomb/Definition
...erful explosive device where the energy is produced through uncontrolled [[Hydrogen fusion]]

138 bytes (17 words) - 22:21, 31 March 2022
Hydrogen/Properties/List

244 bytes (33 words) - 05:49, 6 March 2024
Potential of hydrogen

16 bytes (2 words) - 14:08, 9 October 2007
Hydrogen bond/Bibliography
* George A. Jeffrey. ''An Introduction to Hydrogen Bonding (Topics in Physical Chemistry)''. Oxford University Press, USA (Mar * A New Intermolecular Interaction: Unconventional Hydrogen Bonds with Element-Hydride Bonds as Proton Acceptor Robert H. Crabtree, Per

1 KB (144 words) - 06:45, 13 October 2008
Hydrogen sulfide/Definition
#REDIRECT [[Hydrogen sulphide/Definition]]

42 bytes (4 words) - 09:27, 6 March 2024
Hydrogen/Standard phase

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Hydrogen bond/Approval

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Hydrogen/Atomic symbol

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Hydrogen/Elemental Class
#REDIRECT [[Hydrogen/Periodic table of elements]]

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Hydrogen-like atom/Approval

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Hydrogen/Periodic table of elements
<includeonly> </includeonly><noinclude>Hydrogen is in a class of its own, as in some instances it can behave like a metal a

165 bytes (28 words) - 05:49, 6 March 2024
Hydrogen/Melting point

84 bytes (10 words) - 22:33, 14 April 2011
Hydrogen/Related Articles

159 bytes (19 words) - 15:01, 7 December 2008
Hydrogen/Electron configuration
#REDIRECT [[Hydrogen/Ground state electron configuration]]

58 bytes (6 words) - 13:17, 13 June 2008
Hydrogen sulphide/Related Articles

379 bytes (49 words) - 09:27, 6 March 2024
Hydrogen/Standard Atomic Weight

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Hydrogen bond/Related Articles
Auto-populated based on [[Special:WhatLinksHere/Hydrogen bond]]. Needs checking by a human.

869 bytes (117 words) - 17:20, 11 January 2010
Hydrogen sulfide/Related Articles
#REDIRECT [[Hydrogen sulphide/Related Articles]]

48 bytes (5 words) - 09:27, 6 March 2024
Hydrogen/Ground state electron configuration

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Page text matches

Hydrogen/Electronegativity
Hydrogen's electronegativity is 2.1<ref>http://old.iupac.org/goldbook/E01990.pdf</re

193 bytes (22 words) - 16:26, 13 June 2008
Light water reactor/Definition
...cause its [[hydrogen]] nuclei are H-1, as opposed to [[heavy water]] whose hydrogen nuclei are H-2.

203 bytes (29 words) - 10:21, 12 November 2012
Heavy water reactor/Definition
...that are H-2, as opposed to regular water, called light water because its hydrogen nuclei are H-1.

212 bytes (31 words) - 10:26, 12 November 2012
Ammonia production/External Links
...w.fossil.energy.gov/programs/fuels/hydrogen/currenttechnology.html Today's Hydrogen Production Industry] ...t.org/Files/HydrogenEducation/6HydrogenProductionSteamMethaneReforming.pdf Hydrogen Production – Steam Methane Reforming (SMR)]

806 bytes (106 words) - 08:31, 11 September 2023
Nuclear fusion/Definition
...ergy. In a hydrogen bomb, fusion of deuterium and tritium (two isotopes of hydrogen) releases four times as much energy as the same mass of uranium in a fissio

224 bytes (40 words) - 11:25, 23 May 2023
Hydrogen bonds
#REDIRECT [[Hydrogen bond]]

27 bytes (3 words) - 11:50, 15 July 2008
Hydrogenlike atom
#REDIRECT [[hydrogen-like atom]]

32 bytes (3 words) - 09:31, 17 September 2007
Hydrogen sulfide
#REDIRECT [[Hydrogen sulphide]]

31 bytes (3 words) - 09:27, 6 March 2024
Hydrogenic atom
#REDIRECT [[hydrogen-like atom]]

32 bytes (3 words) - 09:32, 17 September 2007
Hydrogen sulfide/Definition
#REDIRECT [[Hydrogen sulphide/Definition]]

42 bytes (4 words) - 09:27, 6 March 2024
Hydrogen sulfide/Related Articles
#REDIRECT [[Hydrogen sulphide/Related Articles]]

48 bytes (5 words) - 09:27, 6 March 2024
Hydrogen/Electron configuration
#REDIRECT [[Hydrogen/Ground state electron configuration]]

58 bytes (6 words) - 13:17, 13 June 2008
Hydrogen/Elemental Class
#REDIRECT [[Hydrogen/Periodic table of elements]]

49 bytes (6 words) - 08:17, 6 March 2024
Heavy water/Definition
[[Water]] containing the [[isotope]] [[Deuterium]] rather than normal [[hydrogen]]

118 bytes (12 words) - 11:07, 6 May 2010
Deuterium/External Links
Hydrogen isotope information can be found here at http://ie.lbl.gov/education/parent

108 bytes (18 words) - 17:10, 13 January 2008
Hydrocarbons/Definition
A class of molecules that contain only [[carbon]] and [[hydrogen]] atoms.

110 bytes (14 words) - 19:37, 22 March 2009
Bohr radius
...cts the existence of a smallest orbit for the [[electron]] circulating the hydrogen [[nucleus]]. Today the radius of this orbit is called the '''Bohr radius' ...constant|Planck's reduced constant]], μ is the [[reduced mass]] of the hydrogen atom (is equal to the [[electron mass]] when the [[proton mass]] may suppos

1 KB (231 words) - 08:53, 14 September 2013
Oxidation-reduction/Definition
...cule]] (oxidation); chemical gain of electrons, loss of oxygen, or gain of hydrogen, from and atom, ion, or molecule (reduction)

276 bytes (40 words) - 15:52, 1 April 2012
Hydrogen bomb/Definition
...erful explosive device where the energy is produced through uncontrolled [[Hydrogen fusion]]

138 bytes (17 words) - 22:21, 31 March 2022
Alkane/Definition
An organic molecule that contains exclusively carbon and hydrogen atoms, with only single bonds between carbons

147 bytes (19 words) - 15:11, 5 February 2009
Claus process/Definition
A [[Catalyst|catalytic]] chemical process for converting gaseous hydrogen sulphide into elemental sulphur.

142 bytes (16 words) - 09:23, 6 March 2024
Hycean world/Definition
...nclude>{{Subpages}}</noinclude>Water worlds, larger than Earth, with thick Hydrogen atmospheres, and oceans capable of supporting life

138 bytes (18 words) - 08:53, 28 February 2022
Law of definite proportions
...ample of pure water, the mass ratio will always be 88.81% oxygen to 11.20% hydrogen. ...mic weights, the fixed atomic ratio of 2-to-1 means that the mass ratio of hydrogen-to-oxygen in any bulk sample of water will be the same.

2 KB (342 words) - 19:45, 17 May 2010
Bohr radius/Definition
Radius of the first Bohr orbit in the hydrogen atom.

88 bytes (13 words) - 08:45, 29 August 2009
Tritium/Definition
...oactivity|radioactive]] [[isotope]] of the chemical [[elements|element]] [[hydrogen]] containing one [[proton]] and two [[neutron]]s.

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Deuterium/Definition
An [[isotope]] of the chemical element [[hydrogen]] containing one [[proton]] and one [[neutron]].

134 bytes (16 words) - 13:44, 7 July 2008
Hydrogen-like atom/Definition
An [[atom]], excluding [[hydrogen]] itself, with only one electron, having charge +(Z-1), where Z = atomic nu

150 bytes (19 words) - 11:34, 13 July 2008
Hydrophilic/Definition
...property of a molecule that can transiently bond with water (H2O) through hydrogen bonding.

139 bytes (20 words) - 20:25, 3 September 2009
Ammonia production/Definition
The processes for the manufacture of hydrogen (H2) and ammonia (NH3).

127 bytes (18 words) - 20:30, 25 September 2008
Very high temperature reactor/Definition
...a coolant, that might provide process heat for production of zero-carbon [[hydrogen]] from [[water]].<ref>https://www.gen-4.org/gif/jcms/c_9362/vhtr</ref>

196 bytes (31 words) - 02:53, 7 April 2024
Hydrogen bond/Bibliography
* George A. Jeffrey. ''An Introduction to Hydrogen Bonding (Topics in Physical Chemistry)''. Oxford University Press, USA (Mar * A New Intermolecular Interaction: Unconventional Hydrogen Bonds with Element-Hydride Bonds as Proton Acceptor Robert H. Crabtree, Per

1 KB (144 words) - 06:45, 13 October 2008
Acid gas
...[[acidic]] substances such as gaseous [[carbon dioxide]] (CO2), hydrogen sulfide or [[mercaptan]]s (RSH). Thus, carbon dioxide by itself is an acid Before a raw natural gas containing hydrogen sulfide or carbon dioxide can be used, the raw gas must be treated to reduc

2 KB (360 words) - 08:07, 15 March 2024
Sour gas
...]] byproduct [[gas]] or any other gas containing significant amounts of [[hydrogen sulphide]] (H2S). Natural gas is usually considered sour if the ...amounts of [[acidic]] gases such as [[carbon dioxide]] (CO2) or hydrogen sulfide. Thus, carbon dioxide by itself is an acid gas but it is not a sour

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Sour gas/Definition
...refinery byproduct gas, or any other gas containing significant amounts of hydrogen sulfide (H2S).

169 bytes (23 words) - 05:46, 3 March 2011
Cold fusion/Definition
...rgy nuclear reactions that occur in metals saturated with deuterium (heavy hydrogen); widely considered to be [[fringe science|fringe]] or [[pseudoscience]].

200 bytes (24 words) - 18:19, 20 September 2008
Ammonia/Definition
A [[chemical compound]] (NH3) of [[nitrogen]] and [[hydrogen]], occurring as a [[gas]] with a characteristic [[odour]] under [[standard

196 bytes (24 words) - 09:18, 18 March 2010
Tritium/Periodic table of elements
<includeonly></includeonly><noinclude>Tritium behaves almost exactly like hydrogen in most respects and is therefore difficult to classify as a metal or a non

177 bytes (25 words) - 05:50, 6 March 2024
Deuterium/Elemental Class
<includeonly></includeonly><noinclude>Deuterium behaves almost exactly like hydrogen in most respects and is therefore difficult to classify as a metal or a non

179 bytes (25 words) - 06:55, 6 March 2024
Amine gas treating/Definition
A process using aqueous solutions of [[amine]]s to remove [[hydrogen sulphide]] (H2S) and [[carbon dioxide]] (CO2) from [[

187 bytes (28 words) - 09:37, 6 March 2024
Ammonia
...monia''' is a [[chemical compound]] (NH3) of [[nitrogen]] and [[hydrogen]], occurring as a [[gas]] with a characteristic [[odour]] under [[standard

190 bytes (24 words) - 02:00, 13 January 2024
NGC 6523/Definition
...]], that appears to be surrounded by a much larger region of cold, neutral hydrogen.

202 bytes (27 words) - 09:12, 1 October 2009
Gas balloon/Definition
...lled with a gas less dense than air or lighter than air (such as helium or hydrogen).

166 bytes (28 words) - 23:45, 3 September 2009
Aromatic hydrocarbons/Definition
A molecule containing only carbon and hydrogen that exhibits unusual stability and reactivity from having a cyclic conjuga

202 bytes (25 words) - 17:38, 2 November 2010
Van der Waals molecule/Definition
...sting of two or more molecules held together by van der Waals forces or by hydrogen bonds.

159 bytes (24 words) - 04:03, 29 April 2009
Elementary charge/Related Articles
{{r|Hydrogen-like atom}} {{r|Hydrogen}}

777 bytes (99 words) - 16:15, 11 January 2010
Mercaptan/Definition
...ompound that contains the functional group composed of a sulfur atom and a hydrogen atom (-SH).

141 bytes (21 words) - 21:06, 3 September 2009
K-type star/Definition
...usually slightly cooler than our Sun and often orange in colour; includes hydrogen-burning 'main sequence' stars and older, giant stars such as Arcturus.

203 bytes (29 words) - 10:53, 28 October 2011
Amino acid/Definition
Biochemical with an amino group, a carboxyl group, a hydrogen atom, and a side chain bonded to a central carbon.

148 bytes (23 words) - 20:58, 5 October 2009
Heat of combustion/External Links
..._heating_values.xls Lower and Higher Heating Values of Hydrogen and Fuels] Hydrogen Analysis Resource Center, [[U.S. Department of Energy]]

971 bytes (148 words) - 23:47, 23 September 2008
Proton/Related Articles
{{r|Hydrogen bond}} {{r|Hydrogen-like atom}}

2 KB (218 words) - 12:57, 15 March 2024
Zyklon B/Definition
...iginally developed for killing insects and rats, a stable preparation of [[hydrogen cyanide]] that, with modifications, was the chemical used in the [[Auschwit

241 bytes (31 words) - 21:26, 19 January 2011
Hydroxyl/Definition
A molecule consisting of an oxygen atom and a hydrogen atom connected by a covalent bond (single bond).

140 bytes (21 words) - 20:26, 3 September 2009
Monopropellant/Definition
...a [[rocket engine]] but sometimes in a [[turbine]], such as concentrated [[hydrogen peroxide]] passed over a catalyst that breaks it into steam

249 bytes (36 words) - 20:24, 25 March 2010
Hydrogen sulphide/Definition
A [[chemical compound]] with the [[chemical formula|formula]] [[Hydrogen|H]]2[[Sulphur|S]], which is a colorless, highly toxic, flammabl

226 bytes (30 words) - 09:47, 6 March 2024
Hydrogen/Periodic table of elements
<includeonly> </includeonly><noinclude>Hydrogen is in a class of its own, as in some instances it can behave like a metal a

165 bytes (28 words) - 05:49, 6 March 2024
Zyklon B
'''Zyklon B''' was a stabilized preparation of [[hydrogen cyanide]], originally developed for killing insects and rats, but, with mo The basic preparation, for commercial use, had the hydrogen cyanide adsorbed onto an inert substrate, along with a warning agent that w

920 bytes (141 words) - 21:34, 19 January 2011
Alkalosis/Definition
A haematological condition in which the reducing hydrogen ion concentration of arterial blood plasma (alkalemia), results in the pH o

197 bytes (26 words) - 04:26, 30 September 2009
Hertzsprung-Russell diagram
...here most stars - all those in the phase where they shine from energy from Hydrogen fusion in there core, is called the "[[main sequence]]".]] ...gh [[Hydrogen fusion]] - the nuclear process where the nuclei of several [[Hydrogen]] atoms fuse to form an atom of [[Helium]]. Every star above the main sequ

3 KB (519 words) - 12:22, 12 April 2022
Haber process/Definition
...mistry]] — from the [[chemical element|elements]] [[nitrogen]] and [[hydrogen]].

258 bytes (31 words) - 08:37, 4 March 2010
Water/Definition
A chemical compound with one oxygen and two hydrogen atoms (H20). It is often in a liquid form and makes up the bulk

214 bytes (36 words) - 03:50, 18 August 2009
Carbohydrate/Definition
[[Organic compound]]s containing [[carbon]], [[hydrogen]], and [[oxygen]]; includes [[sugar]]s and [[starch]]es that provide [[ener

280 bytes (38 words) - 07:50, 7 April 2010
Electron configuration/Related Articles
{{r|Hydrogen-like atom}} {{r|Hydrogen}}

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Organic chemistry/Definition
...ation (by synthesis or by other means) of chemical compounds of carbon and hydrogen, which may contain any number of other elements.

253 bytes (35 words) - 17:12, 13 May 2008
Oxidation state
...[[LiH]], and oxygen has an oxidation state of -1 in [[peroxide]]s, e.g. [[Hydrogen Peroxide|H2O2]];

1 KB (248 words) - 12:24, 3 April 2012
Chemical symbol
Well-known examples of one-letter symbols are H for [[hydrogen]] and O for [[oxygen]]; For example, H+ means a hydrogen ion, and Ca2+ a calcium ion (with two electrons missing).

3 KB (478 words) - 05:12, 23 October 2013
High Temperature Gas-cooled Reactor
...at with high core outlet temperatures which enables applications such as [[hydrogen production]] or process heat for the petrochemical industry or others. <ref ...ndustrial plants. Hydrogen generation is one of the major objectives, with hydrogen being seen as a petroleum alternative. Competitive reactors include the [[u

2 KB (319 words) - 16:20, 8 January 2023
Schrödinger equation/Related Articles
{{r|Hydrogen-like atom}} {{r|Hydrogen}}

1 KB (143 words) - 10:13, 9 May 2011
Hydrogen bond/Definition
...nd|covalent]] and non-[[Ionic bond|ionic]] [[chemical bond]] involving a [[hydrogen]] [[atom]] and either [[Fluorine]], [[Nitrogen]], or [[Oxygen]].

203 bytes (25 words) - 23:44, 16 July 2008
Tetramethylsilane/Definition
...pound]] with the [[chemical formula|formula]] [[Silicon|Si]]([[Carbon|C]][[Hydrogen|H]]3)4, used as a standard in 1H and <sup

308 bytes (45 words) - 06:39, 7 April 2010
Deuterium
|elClass=Periodic table of elements{{!}}Like Hydrogen, Deuterium can behave as a Metal and a Non-Metal ...occurring isotope of hydrogen and represents 0.015% of naturally occurring hydrogen, with H-1 representing the remaining 99.985%.

2 KB (287 words) - 05:42, 6 March 2024
Rydberg constant/Definition
...ages}}</noinclude>A theoretical constant related to the spectrum of atomic hydrogen defined by the Bohr theory of the atom as: ''R∞ = me<

311 bytes (56 words) - 11:21, 13 March 2011
Inorganic chemistry/Definition
...r of [[organic compound]]s (compounds containing at least one [[carbon]]-[[hydrogen]] bond).

336 bytes (45 words) - 00:27, 5 October 2010
Hydrogen/Isotopes
|+ Isotopes of Hydrogen and Their Properties

441 bytes (54 words) - 10:25, 2 May 2008
Atmosphere
...ry powerful gravity, due to its large mass, and is capable of holding onto hydrogen. ...ydrogen when the sun went nuclear 5 billion years ago and blew much of the hydrogen out of the inner [[solar system]]. Saturn's moon [[Titan]] also has an atmo

3 KB (509 words) - 11:48, 2 February 2023
Edward Teller/Definition
...h century because of his role as the main developer of the [[fusion device|hydrogen bomb]], his outspoken defense of an unassailable nuclear arsenal, and suppo

372 bytes (49 words) - 18:17, 18 June 2009
Suiso Frontier
...demonstrator, to try to show that shipping industrial quantities of liquid hydrogen could play a significant role in the world's energy economy.<ref name=kawas The vessel is capable of carrying 1,250 cubic metres of liquid hydrogen in a single sperical insulated double walled tank.<ref name=offshoreEnergyB

9 KB (1,054 words) - 13:51, 27 February 2022
Johannes Diderik van der Waals/Related Articles
{{r|Hydrogen bond}}

190 bytes (27 words) - 07:12, 7 May 2008
Haber process
...ss''' is a process used to produce the useful substance [[ammonia]] from [[hydrogen]] and [[nitrogen]]. ==Sources of hydrogen and nitrogen==

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Nuclear fusion
...ergy. In a hydrogen bomb, fusion of deuterium and tritium (two isotopes of hydrogen) releases four times as much energy as the same mass of uranium in a fissio

1 KB (233 words) - 14:56, 23 May 2023
Atomic number/Related Articles
{{r|Hydrogen-like atom}} {{r|Hydrogen}}

2 KB (229 words) - 09:18, 6 March 2024
Rydberg constant
...infin;'', originally defined empirically in terms of the spectrum of hydrogen, is given a theoretical value by the Bohr theory of the atom as (in [[SI un ...ar=1988 |publisher=World Scientific |author=GW Series |chapter=Chapter 10: Hydrogen and the fundamental atomic constants}}

4 KB (708 words) - 17:44, 8 June 2022
Diatomic molecule
...gas phase are oxygen and nitrogen (the main components of air), as well as hydrogen and at least four of the halogens (fluorine, chlorine, bromine, iodine, and

332 bytes (53 words) - 21:15, 10 November 2020
Hydrogen sulphide
{{Image|Hydrogen sulfide.png|right|150px|}} ...fide'') is a [[chemical compound]] with the [[chemical formula|formula]] [[Hydrogen|H]]2[[Sulphur|S]]. It is a colourless, highly toxic, flammable [

6 KB (862 words) - 09:35, 6 March 2024
Nucleoside/Related Articles
{{r|Hydrogen bond}}

339 bytes (43 words) - 11:14, 22 February 2010
Merox/Related Articles
{{r|Hydrogen sulphide}}

247 bytes (29 words) - 09:39, 6 March 2024
Ocean acidification
...oes so less readily than carbonic acid. When the bicarbonate ion loses its hydrogen ion, it forms the double-charged negative carbonate ion (CO3<sup

2 KB (371 words) - 01:49, 9 March 2008
Phosgene
...is a [[choking gas]] that reacts with water to produce carbon dioxide and hydrogen chloride gas, which is corrosive. Exposure can lead to [[pulmonary edema]] ...px|Phosgene decomposes in the presence of water to form carbon dioxide and hydrogen chloride gas.}}

1 KB (194 words) - 12:46, 11 June 2009
Memory of water/Related Articles
{{r|Hydrogen bond}}

436 bytes (51 words) - 00:01, 15 January 2011
Tritium
|elClass=Periodic table of elements{{!}}Like Hydrogen, Tritium can behave as a Metal and a Non-Metal ...symbol '''T''' or '''3H''', is an [[isotope]] of the element [[hydrogen]] that has a nucleus containing one [[proton]] and two [[neutron]]s (i.e.,

1 KB (194 words) - 05:43, 6 March 2024
Claus process/Related Articles
{{r|Hydrogen sulphide}}

290 bytes (33 words) - 09:52, 6 March 2024
Sour gas/Related Articles
{{r|Hydrogen sulphide}}

295 bytes (35 words) - 09:39, 6 March 2024
Acid gas/Related Articles
{{r|Hydrogen sulphide}}

295 bytes (35 words) - 09:39, 6 March 2024
Nucleotide/Related Articles
{{r|Hydrogen bond}}

441 bytes (57 words) - 11:13, 22 February 2010
Haber process/Related Articles
{{r|Hydrogen}}

196 bytes (24 words) - 22:21, 6 August 2008
Zeppelin/Related Articles
{{r|Hydrogen}}

379 bytes (50 words) - 05:22, 3 September 2009
Glycine
...ein]]s. The ''[[side chain]]'', or ''[[residual group]]'' of glycine is a hydrogen atom. It is one of the non-polar amino acids.

372 bytes (59 words) - 08:08, 8 June 2009
Welding/Related Articles
{{r|Hydrogen}}

400 bytes (49 words) - 21:35, 11 March 2011
Hydrodesulfurization/Related Articles
{{r|Hydrogen sulphide}}

354 bytes (43 words) - 09:39, 6 March 2024
Metabolic acidosis/Definition
...terize as abnormally increased acidity — measured as pH reduction or hydrogen ion concentration ([H+]) increase — accompanied by abnorma

558 bytes (73 words) - 15:04, 7 January 2010
Hydrocracking/Related Articles
{{r|Hydrogen sulphide}}

456 bytes (53 words) - 09:39, 6 March 2024
Amine gas treating/Related Articles
{{r|Hydrogen sulphide}}

393 bytes (48 words) - 09:39, 6 March 2024
Fluorine/Related Articles
{{r|Hydrogen bond}} {{r|Hydrogen}}

2 KB (280 words) - 09:18, 6 March 2024
Moderator (nuclear)
...ials with a low-Z (i.e., low [[atomic number]], such as [[beryllium]] or [[hydrogen]]) restrict the flow of particles (e.g., [[neutron]]s) while high-Z materia

409 bytes (62 words) - 16:30, 11 May 2010
Energy storage
...tric density) for several fuels.<ref>https://www.energy.gov/eere/fuelcells/hydrogen-storage</ref>}} ==Hydrogen==

6 KB (946 words) - 11:51, 11 April 2023
Natural gas/Related Articles
{{r|Hydrogen sulphide}}

555 bytes (69 words) - 09:39, 6 March 2024
Aromatic hydrocarbons
...romatic compound]]s with [[chemical element]]s other than [[carbon]] and [[hydrogen]], so they are aromatic but not hydrocarbons. ...ylene]] to give [[ethylbenzene]], which in turn can give [[styrene]] and [[hydrogen]] ( H2). Styrene is commonly used as a monomer for polymer

5 KB (750 words) - 22:31, 28 November 2012
Natural gas processing/Related Articles
{{r|Hydrogen sulphide}}

532 bytes (68 words) - 09:39, 6 March 2024
Ammonia production/Related Articles
{{r|Hydrogen}}

306 bytes (37 words) - 19:38, 31 May 2010
Reduction potential
...ial is measured in [[volt]]s (V) and is defined relative to the [[standard hydrogen electrode]] (SHE), which is arbitrarily given a potential of 0.00 volts. '' ...s having a positive redox potential; any system donating electrons to the hydrogen electrode is defined as having a negative redox potential. Eh i

3 KB (523 words) - 08:32, 13 February 2009
Heavy water
...2O''' [[water]] with the isotope [[deuterium]] replacing normal hydrogen. Heavy water has many uses in [[nuclear engineering]], especially as a [[mo

550 bytes (85 words) - 11:05, 6 May 2010
Dissociation constant/Related Articles
{{r|Hydrogen bond}}

454 bytes (58 words) - 16:01, 11 January 2010
Bohr radius/Related Articles
{{r|Hydrogen-like atom}}

486 bytes (62 words) - 11:26, 11 January 2010
Electron shell
...er]] ''n''. There are ''n''2 spatial orbitals in a shell; see [[hydrogen-like atom]]s. For instance, the ''n'' = 3 shell contains nine orbitals: one In the case of [[hydrogen-like atom|hydrogen-like]]—one-electron—atoms all orbitals within one shell are de

3 KB (430 words) - 13:54, 3 March 2023
Electron/Related Articles
{{r|Hydrogen-like atom}} {{r|Hydrogen}}

2 KB (289 words) - 12:57, 15 March 2024
Periodic table of elements/Gallery
...lectron configuration]] and providing a new approach to the placement of [[hydrogen]] and [[helium]].

616 bytes (84 words) - 06:33, 6 March 2024
Uracil/Related Articles
{{r|hydrogen bond}}

449 bytes (54 words) - 12:48, 19 June 2008
Absorption (chemistry)
...as from the feedstock to an [[ammonia production]] plant by contacting the hydrogen sulfide with a bed of solid [[zinc oxide]] (ZnO) with which it reacts to fo ...illation of the ethanolamine solution. However, the reactive absorption of hydrogen sulfide by zinc oxide cannot be reversed. The reactive absorption of carbon

4 KB (618 words) - 01:55, 14 March 2024
Hydrogen bond
...thin green lines from the molecule in the center of the picture represent hydrogen bonds.}} .... Although stronger than most other [[intermolecular force]]s, the typical hydrogen bond is much weaker than both the [[ionic bond]] and the [[covalent bond]].

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Polyatomic ion
* A Hydroxide ion is made of one oxygen ion and one hydrogen ion: its chemical formula is (OH)-. It has a negative charge. * An [[Ammonium]] ion is made up of one nitrogen atom and four hydrogen atoms: its Chemical Formula is (NH4)+. It has a posit

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Gas stoichiometry
===Acetylene and hydrogen produced by cracking methane=== For example, if we want to determine the volume of [[acetylene]] and [[hydrogen]] gases produced by cracking 100 grams of [[methane]] gas as per this chemi

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Acid
...cids''' are generally defined as those chemical substances which release [[hydrogen]] [[ions]] on dissolving in water. Although acids are most often thought of ...ractically will not come off as H+ ions, and therefore only the hydrogen on the -COOH group is considered acidic. There is a drawback in this t

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Adenosine
...'- positions. In duplex DNA, the [[adenine]] base present in adenosine is hydrogen bonded with, that is, it forms a base pair with, a [[thymidine]] nucleotide ...bose ring (see figure). In DNA the 2'-carbon of adenosine is bound to two hydrogen atoms rather than one proton and one hydroxyl group.

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Sulfonamide
...equation R-SO2-NH2, where either of the nitrogenous hydrogen atoms may be replaced by other chemical groups. A large class of [[antibio

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X-1 (submarine)
...lacement of 36 tons, first used a [[hydrogen peroxide]] propulsion system. Hydrogen peroxide, while dangerously reactive, demonstrated significant promise for

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Molecular mass
...H2O) as an example. The two naturally occurring isotopes of the hydrogen atom are: The standard atomic weight (isotopically averaged mass) of hydrogen is 1.00794 u.

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Unified atomic mass unit/Related Articles
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Biosynthesis
...rbon-containing molecules, red, use of ATP, green, used of reducing power (hydrogen). The position of '''biosynthesis''' as a distinct stage in assembly of cel * Reduction equivalents (in the form of hydrogen carried on the coenzymes [[NADH]], [[NADPH]] and others)

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Squalane
...bon-carbon) bonds to saturated (single) C—C bonds by addition of [[hydrogen]]. It is also possible to first hydrogenate shark liver oil and then separa

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Lead/Compounds/List
...|Leadhillite|Lead carbonate|Lead chalcogenide|Lead dioxide|Lead glass|Lead hydrogen arsenate|Lead scandium tantalate|Lead styphnate|Lead tetroxide|Lead zircona

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Asparagine
...2-C(O)-NH2. This side chain is capable of forming [[hydrogen bond]]s with other chemical entities that are electron donors. It is very

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Nitrile
*Nitriles are reduced to [[amine|amines]] by [[hydrogen]] and a [[nickel]] catalyst

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Hydrogen bond/Related Articles
Auto-populated based on [[Special:WhatLinksHere/Hydrogen bond]]. Needs checking by a human.

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Chemical name
...C2H5OH is more common for ethanol, to show that one hydrogen and one oxygen combine in a [[hydroxyl]] group.

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Sun
...]] and myriad [[asteroids]] revolving around it. It mainly consists of [[hydrogen]], which it converts to [[helium]] through a process of [[nuclear fusion]], Hydrogen, about 75%; helium, about 25%; at least 70 other elements make up the remai

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Guanine
...ytosine]] form a very stable Watson-Crick [[base pair]] containing three [[hydrogen bond]]s.

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Phosphorus/Compounds
[[Disodium hydrogen phosphite]] 

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Acid-Base homeostasis
...y, targeting for stabilization the concentration of the positively charged hydrogen ion, [H+], a proton, the concentration often expressed in terms Hydrogen ions, protons, in aqueous solution bind to water molecules, molecules of H<

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Water/Related Articles
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Neutron moderator
===Hydrogen=== Both as ordinary hydrogen and as [[deuterium]], hydrogen moderates neutrons. Most often, it does so in the form of water or heavy wa

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Lactic fermentation
...is of the glycolytic pathway in humans indicates that there are not enough hydrogen ions present in the glycolytic intermediates to produce lactic or any other ...P]] is [[Hydrolysis|hydrolysed]], a hydrogen ion is released. ATP-derived hydrogen ions are primarily responsible for the decrease in pH. During intense exerc

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Cryoprotectant
...hydrogen bonds with biological molecules as water molecules are displaced. Hydrogen bonding in aqueous solutions is important for proper protein and DNA functi

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Periodic table of elements/Related Articles
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Hydroxyl
...radical formed in radiation chemistry, since it leads to the formation of hydrogen peroxide and oxygen, which can enhance corrosion and SCC in coolant systems ...action with many [[volatile organic compounds]] (VOCs) is the removal of a hydrogen atom forming water and an [[alkyl]] radical (R·).

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Supramolecular chemistry
...ar weaker and reversible noncovalent interactions, such as [[hydrogen bond|hydrogen bonding]], metal coordination, [[hydrophobic effect|hydrophobic forces]], [ ...ized that there were two separate strands of nucleotides connected through hydrogen bonds. The use of noncovalent bonds is essential to replication because the

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LZ-129 Hindenburg
...a]] (which had a near monopoly on Helium supplies at the time) flammable [[Hydrogen]] was used instead.

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Principal quantum number
...but it is also part of the solution of the [[Schrödinger equation]] for [[hydrogen-like atom]]s. It is a positive integer (''n'' = 1, 2, 3, …) that ind In the Bohr-Sommerfeld ("old") quantum theory, the electron in a hydrogen-like (one-electron) atom moves in [[Ellipse|elliptic]] orbits. The principa

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Chemical compound
...ub>2[[Oxygen|O]]) is a compound whose [[molecule]]s consist of two [[hydrogen]] (H) atoms bonded to one [[oxygen]] (O) atom. Note a 1 after the O is und ...ermediate classes of compounds exist, which feature polar covalent bonds. Hydrogen fluoride is one example.

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Methane
...ethane is used in the heating of homes and the industrial preparation of [[hydrogen]]. In [[chemistry]], it is the first member of a series of saturated hydroc

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Memory of water/Bibliography
.../nature03383.html ''Ultrafast memory loss and energy redistribution in the hydrogen bond network of liquid H2O''].    Letters to Natur

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Slater orbital
...cle on [[hydrogen-like atom#Quantum numbers of hydrogen-like wavefunctions|hydrogen-like orbitals]] is explained that the angular parts can be designated by le

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Proton
...m hydrogen (1H), and the addition of one or two neutrons to the hydrogen atom forms the isotopes [[deuterium]] (2H) or [[tritium]] (

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Very high temperature reactor
...s a coolant, that might provide process heat for production of zero-carbon hydrogen from water.<ref>https://www.gen-4.org/gif/jcms/c_9362/vhtr</ref>

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Adenosine triphosphate
...ration]], the [[Calvin cycle]] in plants, and through a [[membrane]]-bound hydrogen pump in the [[mitochondria]] called [[ATP synthase]].

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Geomicrobiology
...elow the surface. The energy sources for growth of these microbes includes hydrogen gas generated in the interior of the planet, and it is estimated the biomas ...tes that certain microbes can thrive in the absence of sunlight by using [[hydrogen]] gas..."

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Quantum mechanics/Timelines
...[[Niels Bohr]]'s explanation of stationary states of [[hydrogen-like atom|hydrogen atom]]

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Metabolic acidosis
...increased [[acidity]] — measured as decreased [[pH]] or increased [[hydrogen ion]] concentration (the concentration symbolized as [H+]) &mdas ...issociation of carbonic acid, which occurs rapidly spontaneously, yielding hydrogen ions, the bicarbonate concentration also ''increasing'' to abnormally incre

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PH
...es referred to as the '''''power of hydrogen''''' or the '''''potential of hydrogen'''''. ...p://science.jrank.org/pages/49372/pH.html pH: Potenz, The Determination of Hydrogen Ions, History of Analytical Chemistry, Electrochemistry, Past and Present]

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Hycean world
...).png | thumb | a hycean world would be a water planet, covered by a thick Hydrogen atmosphere.]] ...would have a thick ocean, where life might be found, covered by a thich [[Hydrogen]] atmosphere.

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Propellant
They have different storage lives, from hours to supercooled liquid hydrogen, to years for some stored chemicals. Experienced diesel fuel engineers do n

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Cryogenics
...'s atmosphere|air]]) lie below -180 °C while the [[Freon]] refrigerants, [[hydrogen sulphide]], and other common refrigerants have boiling points above − ...named after their inventor, [[James Dewar]], the man who first liquefied [[hydrogen]]. Museums typically display smaller [[vacuum flask]]s fitted in a protect

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Interstellar matter
...(primarily aluminium, calcium magnesium, and iron). The lightest elements, hydrogen, helium and lithium, were formed during the [[Big Bang]]. Heavier elements .../sup> in the densest molecular regions. This is about the same as a single hydrogen atom per cubic centimetre or nearly 20 orders of magnitude below that of th

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Ammonia production
...animal products; the reduction of [[nitrous acid]] and [[nitrite]]s with [[hydrogen]]; and the decomposition of [[ammonium salt]]s by [[alkaline hydroxides]] o The [[Haber process]], which is the production of ammonia by combining hydrogen and [[nitrogen]], was first patented by [[Fritz Haber]] in 1908. In 1910, [

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Ether (chemistry)
...se oxiranes are less stable than other cyclic ethers due to ring strain, [[hydrogen bromide]] (HBr) can be used, without additional heat, to cleave oxiranes su

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Ammonia production/Citable Version
...animal products; the reduction of [[nitrous acid]] and [[nitrite]]s with [[hydrogen]]; and the decomposition of [[ammonium salt]]s by [[alkaline hydroxides]] o The [[Haber process]], which is the production of ammonia by combining hydrogen and [[nitrogen]], was first patented by [[Fritz Haber]] in 1908. In 1910, [

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Clathrate
..., [[isobutane]], normal [[butane]], [[nitrogen]], [[carbon dioxide]] and [[hydrogen sulphide]].

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Hydrodesulfurization
...phide]] gas. In [[Petroleum refining processes|petroleum refineries]], the hydrogen sulfide gas is then subsequently converted into byproduct elemental [[sulph ...he vapor phase could be converted into [[saturated]] hydrocarbons by using hydrogen and a catalytic metal. His work was the foundation of the modern catalytic

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Ammonium persulfate
...ne]] (O32-, 2.2) but stronger than both [[hydrogen peroxide]] (H2O2, 1.8 V) and [[permanganate]] (MnO<su

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Chlorine/Related Articles
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Flue gas emissions from fossil fuel combustion
...volume by water vapor (H20) created by the combustion of the [[hydrogen]] in the fuel with atmospheric oxygen. Much of the 'smoke' seen exiting fr ...ural gas produces more water vapor than does the burning of coal since the hydrogen-to-[[carbon]] ratio of natural gas is higher than that of coal.

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Sulfuric acid
...SO4- is a medium strength acid from which the second hydrogen dissociates to form the ''[[sulfate]]'' anion SO4-2<

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Hydrodesulfurization/Citable Version
...phide]] gas. In [[Petroleum refining processes|petroleum refineries]], the hydrogen sulfide gas is then subsequently converted into byproduct elemental [[sulph ...he vapor phase could be converted into [[saturated]] hydrocarbons by using hydrogen and a catalytic metal. His work was the foundation of the modern catalytic

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Chemical bond/Related Articles
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Nitrogen
...cale uses the [[Haber process|Haber-Bosch process]], in which nitrogen and hydrogen gasses react, in the presence of iron, heat and pressure, to produce ammoni ...ause the molecule has a pyramidal structure, it is very polar and can form hydrogen bonds with water so that saturated aqueous ammonia is 15 M.

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Vitamin E
...l]]s that exhibit [[alpha-tocopherol]] activity. by virtue of the phenolic hydrogen on the 2h-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree

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PUREX
...for both the actinides and other metals such as [[ruthenium]]. The dibutyl hydrogen phosphate can make the system behave in a more complex manner as it tends t

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Hydrogen
|elName=Hydrogen '''Hydrogen''' is a [[Chemical elements|chemical element]], typically found as a [[gas]

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Protein structure
...condary structure]] and by the overall tertiary structure of the protein. Hydrogen bonding also plays a significant role in a protein's structure, especially ...kbone atoms form a coil (black bonds) while the carbonyl groups (red) form hydrogen bonds with the amide groups (blue)}}

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Hydrocracking
..., [[jet fuel]] and [[diesel oil]]. The process takes place in a [[Hydrogen|hydrogen-rich]] atmosphere at elevated [[temperature]]s (260 – 425 [[Celsius|°C] ...ing feedstock are, to a large extent, also hydrogenated and form gaseous [[hydrogen sulphide]] (H2S) and [[ammonia]] (NH3) which are subs

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Search for Extraterrestrial Intelligence
...s received on Earth. Observations focus on the 1420 MHz frequency at which hydrogen radiates, knowledge of which is believed to be a prerequisite for any civil

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Drug Enforcement Administration/Lists
# [[Hydrochloric acid]] (including anhydrous hydrogen chloride)

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Supernova
...the mass of our Sun can continue to burn each element synthesised in turn, hydrogen, helium, then [[carbon]], [[oxygen]], [[silicon]] and so forth until they a ...hemselves. This mass deficiency is different from element to element, with hydrogen having a very low deficiency. Iron has the highest deficiency of all elemen

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Red dwarf (star)
Red dwarfs [[Nuclear fusion|fuse]] [[hydrogen]] to [[helium]] via the [[Pp chain|proton-proton (PP) chain]]. Due to the l ...ed dwarfs are fully convective, they can burn a larger proportion of their hydrogen before leaving the [[main sequence]] than larger stars, such as our sun. Re

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Inorganic chemistry
...r of [[organic compound]]s (compounds containing at least one [[carbon]]-[[hydrogen]] [[covalent bond]]).<ref>[http://www.science.uwaterloo.ca/~cchieh/cact/app ...sidered to be an organic compound even though it does not contain a carbon-hydrogen bond.

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Atomic orbital
...one-electron Schrödinger equation for an atomic electron. In the case of [[hydrogen-like atom|one-electron atom]]s the Schrödinger equation is exactly solvab ...bitals]] (STOs) or [[Gaussian type orbitals]] (GTOs). [[Hydrogen-like atom|Hydrogen-like orbitals]] are rarely applied in numerical calculations, because they

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Orbital hybridisation
..., superimposed on each other in various proportions. The angular parts of hydrogen-like orbitals are used as a basis for simple schemes of hybridisation, beca ...e carbon should have 4 orbitals with the correct symmetry to bond to the 4 hydrogen atoms. The problem with the existence of methane is now this: Carbon's [[g

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Potassium
...te, reactive metal. Potassium reacts violently with [[water]], producing [[hydrogen]]. With a density of 0.862 g/cc, potassium is less dense than water.

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Graf Zeppelin (LZ-127)
...Eckener was successful in lobbying the U.S. government for the purchase of Hydrogen but ruled it out on financial grounds. ...aith in the security of dirigibles was shattered, and flying passengers in hydrogen-filled vessels became untenable. LZ 127 ''Graf Zeppelin'' was retired one m

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DNA/Related Articles
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Electron orbital
...that an electron orbit is not a trajectory, but a stationary state of the hydrogen atom. ...ouds than planetary orbits. As a matter of fact, the angular parts of the hydrogen wave functions are spherical harmonic functions and hence they have the sa

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Hydrogen-like atom
...tary charge]]. A better—but never used—name would therefore be hydrogen-like [[cation]]s. ...on orbital#atomic orbital|atomic orbitals]]. The orbitals of the different hydrogen-like atoms differ from one another in one respect only: they depend on the

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Joule-Thomson effect
...K (−222 °C), and for [[hydrogen]], about 202 K (-71 °C). Thus, helium and hydrogen will warm during a J-T expansion at typical room temperatures. On the othe ...is reason, a simple Linde cycle cannot normally be used to liquefy helium, hydrogen and [[neon]].

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Hindenburg (LZ-129)/External Links
*[http://www.abc.net.au/science/k2/moments/s1052864.htm Hindenburg & Hydrogen]

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Joule-Thomson effect/Citable Version
...K (−222 °C), and for [[hydrogen]], about 202 K (-71 °C). Thus, helium and hydrogen will warm during a J-T expansion at typical room temperatures. On the othe ...is reason, a simple Linde cycle cannot normally be used to liquefy helium, hydrogen and [[neon]].

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Uracil
...a hydrogen bond with one of the amino protons (H61) of adenine. A second hydrogen bond is formed between the uracil H3 proton and the adenine N1 nitrogen ato

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Petroleum naphtha/Citable Version
...called ''hydrodesulfurization'' which converts the sulfur compounds into [[hydrogen sulphide]] [[gas]] that is removed from the naphtha by [[Continuous distill ...gas processing]] plants (which also use amine gas treating units to remove hydrogen sulfide from the raw [[natural gas]]).<ref>[http://minerals.usgs.gov/minera

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Atomic number
...ry, it was discovered that atomic masses are not integral multiples of the hydrogen mass; now we understand that this is because isotopically averaged masses w ...tely understood. In 1913 protons (which, after all, are nothing but atomic hydrogen [[cation]]s) were well-known, but the [[neutron]] still had to be discovere

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Magnetometer
An [[inductor]] creates a strong magnetic field around a [[hydrogen]]-rich fluid, causing the protons to align themselves with the newly create ...en a special liquid (containing free, unpaired electrons) is combined with hydrogen atoms and then exposed to secondary polarization from a radio frequency (RF

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Natural gas processing
*[[Acid gas]]es: [[carbon dioxide]] (CO2), [[hydrogen sulphide]] (H2S) and [[mercaptan]]s such as [[methanethiol]] (CH *Contain no more than trace amounts of components such as hydrogen sulfide, carbon dioxide, mercaptans, nitrogen, and water vapor.

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Boron
|hazard=Boron hydrogen compounds (boranes) are toxic as well as highly flammable ...s and react readily with water to produce boric acid and the corresponding hydrogen halide.

5 KB (804 words) - 19:43, 31 December 2020
Amine gas treating
...rious [[alkanol]]s (commonly referred to as simply [[amine]]s) to remove [[hydrogen sulphide]] (H2S) and [[carbon dioxide]] (CO2) from [[ ...lt in products which no longer have the sour, foul odors of mercaptans and hydrogen sulfide.

9 KB (1,476 words) - 09:37, 6 March 2024
Amine gas treating/Citable Version
...rious [[alkanol]]s (commonly referred to as simply [[amine]]s) to remove [[hydrogen sulphide]] (H2S) and [[carbon dioxide]] (CO2) from [[ ...lt in products which no longer have the sour, foul odors of mercaptans and hydrogen sulfide.

9 KB (1,470 words) - 09:37, 6 March 2024
Claus process
...''' is a [[Catalyst|catalytic]] chemical process for converting gaseous [[hydrogen sulphide]] (H2S) into elemental [[sulphur]] (S).<ref name=Gary>{ ...[[natural gas]] and from the by-product [[sour gas|sour gases]] containing hydrogen sulfide derived from refining [[petroleum crude oil]] and other industrial

13 KB (1,990 words) - 09:37, 6 March 2024
Nuclear reactor
...as both a moderator and a coolant to carry away heat simultaneously. The hydrogen in such light water is practically 100% H-1. A nuclear reactor which uses ...st nuclei are in hydrogen-2 (2H, H-2, or D, also called ''heavy hydrogen'' or ''[[deuterium]]'') atoms and moderate neutrons for fission quite well

10 KB (1,554 words) - 14:19, 24 January 2023
Petroleum naphtha
...called ''hydrodesulfurization'' which converts the sulfur compounds into [[hydrogen sulphide]] [[gas]] that is removed from the naphtha by [[Continuous distill ...gas processing]] plants (which also use amine gas treating units to remove hydrogen sulfide from the raw [[natural gas]]).<ref>[http://minerals.usgs.gov/minera

10 KB (1,443 words) - 09:37, 6 March 2024
Atomic electron configuration
See [[hydrogen-like atom]] for a further explanation of this notation. See the article [[e <tr><td>1 <td>H <td>[[Hydrogen]] <td bgcolor="#D0D0D0">1 <td>

21 KB (3,868 words) - 09:15, 6 March 2024
Law of multiple proportions (chemistry)
...hylene and methane, and found that methane contained exactly twice as much hydrogen as ethylene. Why this mathematical simplicity? <ref name=jaffe76>Jaffe B. ( ...tomic weights of different elements — relative to the unit weight of hydrogen.

11 KB (1,717 words) - 18:42, 4 January 2012
Catalytic reforming/Citable Version
...e hydrocarbon molecules and produces very significant amounts of byproduct hydrogen [[gas]] for use in a number of the other processes involved in a modern pet ...that use [[methanol]] or [[biomass|biomass-derived]] feedstocks to produce hydrogen for [[fuel cells]] or other uses.

19 KB (2,771 words) - 09:16, 6 March 2024
Catalytic reforming
...e hydrocarbon molecules and produces very significant amounts of byproduct hydrogen [[gas]] for use in a number of the other processes involved in a modern pet ...that use [[methanol]] or [[biomass|biomass-derived]] feedstocks to produce hydrogen for [[fuel cells]] or other uses.

19 KB (2,792 words) - 09:16, 6 March 2024
Polymerase chain reaction
...the temperature is raised to above 90° C. Due to the high temperature, the hydrogen bonds between the two strands of DNA break and the strands are separated. N

2 KB (331 words) - 07:01, 17 August 2016
Helium/Related Articles
{{r|Hydrogen}}

2 KB (323 words) - 12:57, 15 March 2024
Energy policy and global warming
...urs. Energy for transportation could be electrical for light vehicles, and hydrogen for larger vehicles and rail. Synthetic fuel could be generated for airplan ...ion for storage in a few favorable locations. Batteries are too expensive. Hydrogen may be possible, but the technology is still being developed. See [[Energy

9 KB (1,503 words) - 15:56, 17 July 2023
Radiation chemistry
...diation. An example is the conversion of water into [[hydrogen]] gas and [[hydrogen peroxide]]. ...of organic compounds has been reported. For instance the use of radiogenic hydrogen peroxide (formed by irradation) to remove sulfur from [[coal]] has been rep

12 KB (1,939 words) - 12:51, 15 March 2024
Hydrocarbons
...carbons''' are a class of [[molecule]]s that contain only [[carbon]] and [[hydrogen]] atoms. Some of them make very good fuels. [[Gasoline]] contains a mixtu ...s as the number of carbon atoms, with each carbon atom being bonded to two hydrogen atoms and to two other carbon atoms. They are referred to as '''cycloalkane

8 KB (1,213 words) - 11:30, 2 November 2010
Carbon
...known as [[allotrope]]s of carbon. Most organic carbon compounds contain [[hydrogen]]; those that contain [[oxygen]] as well include the extensive class of [[c

5 KB (806 words) - 17:16, 1 January 2021
Integral Fast Reactor/Debate Guide
...s using quantitative numbers relating to the potential explosive energy of hydrogen that could be rapidly generated from contact of 5000 tons of reactive, neut ...causing the rapid generation of hydrogen and a very powerful and energetic hydrogen detonation. 

7 KB (1,065 words) - 11:05, 7 July 2023
Van der Waals molecule
...of two or more molecules held together by [[van der Waals forces]] or by [[hydrogen bonds]]. The name originated in the beginning of the 1970s when stable mole

2 KB (310 words) - 17:14, 15 November 2007
Universe
...[[Star|stars]], with each star containing about 1057 atoms of [[hydrogen]]. ...]] and 4% [[atoms]]. Thus the density of atoms is on the order of a single hydrogen [[nucleus]] (or atom) for every four cubic meters of volume. The exact natu

8 KB (1,199 words) - 20:34, 8 June 2010
Chemical reaction
*[[Electrolysis]] of water to form [[hydrogen]] (H2) and [[oxygen]] (O2) [[gas]]es (absorbs electri :[[Nitrogen|N]]2 + 3 [[Hydrogen|H]]2 → 2 [[Ammonia|NH3]]

11 KB (1,592 words) - 09:15, 28 September 2013
Taurine
...ation step, as illustated in the figure. In the first oxidation step, the hydrogen on the sulfur atom is replaced with an [[hydroxyl]] group (OH), creating a

3 KB (353 words) - 11:31, 11 December 2010
Wow! Signal
...he hydrogen line, and the second being about 0.0498 MHz more than the hydrogen line. The [[Bandwidth (signal processing)|bandwidth]] of the signal is less

12 KB (1,817 words) - 22:07, 30 April 2013
Sulfur dioxide
In the laboratory, it can be made by reacting [[sodium hydrogen sulfide]] with a strong acid, such as sulfuric acid.

2 KB (354 words) - 09:16, 6 March 2024
Lactam
..., general route to <math>\alpha</math>-lactam (aziridinone) products. The hydrogen gas and sodium halide by-products are readily removed.<ref>{{cite journal|j

2 KB (362 words) - 17:14, 21 March 2024
Ion selective electrode
...specific, hence the ''selective'' description. The most common type is a hydrogen-sensing electrode used in [[pH]] measurements. They are increasingly common

2 KB (343 words) - 09:43, 3 March 2011
Heat of combustion
| align="center"|[[Hydrogen]] <ref name=Perry>{{cite book|author=Perry, R.H. and Green, D.W. (Editors)| .../hydrogen/datasheets/lower_and_higher_heating_values.xls Heating Values of Hydrogen and Fuels] [[U.S. Department of Energy]]</ref>

13 KB (1,833 words) - 05:42, 19 October 2013
Silver
...l reactivity is quite low, but can tarnish in the presence of [[ozone]], [[hydrogen sulphide]], or air mixed with [[sulphur]].<ref name=LANL/>

2 KB (332 words) - 09:37, 6 March 2024
Spent nuclear fuel
...ode]] where instead of a metal [[anode]] reacting and dissolving it is the hydrogen gas which is consumed.

8 KB (1,357 words) - 12:52, 15 March 2024
Stark effect
...euss. Akad. d. Wiss.</ref> undertook measurements on excited states of the hydrogen atom and succeeded in observing splittings. ...ass Wasserstoffspektrum vom Standpunkt der neuen Quantenmechanik'' (On the hydrogen spectrum from the point of view of the new quantum mechanics). Zeitschrift

13 KB (2,036 words) - 18:38, 10 February 2010
Three Mile Island
...he evening of March 28. By March 30, there were new concerns about a large hydrogen bubble which had formed inside the reactor and seemed to be in danger of br

2 KB (371 words) - 10:43, 8 April 2024
Cost of nuclear power
...the cost of [[Energy storage|storage]]. The most promising possibility is hydrogen at $0.12 per kWh (see below). Assuming this cost is distributed evenly over ===Hydrogen:===

18 KB (2,675 words) - 03:50, 8 January 2024
Hermitian operator
...ful. For instance, the normalizable eigenstates of a [[hydrogen-like atom|hydrogen-like]] Hamilton operator do not span the whole vector space that they belon

8 KB (1,273 words) - 11:29, 9 July 2009
Unified atomic mass unit
The unit ''u'' is convenient because one [[hydrogen]] atom has a mass of approximately 1 ''u'', and more generally an [[atom]] ...in the early nineteenth century, who introduced the mass of one atom of [[hydrogen]] as the atomic mass unit. Later [[Francis Aston]], inventor of the [[mass

7 KB (1,035 words) - 13:02, 11 September 2011
George Eugene Uhlenbeck
...explain certain regularities that were observed in the spectra of atomic [[hydrogen]] and [[helium]]. Initially they thought that electrons rotate physically a

2 KB (357 words) - 10:17, 8 April 2023
Amide
...e]], with the general formula R2N-(where R refers to hydrogen or any alkyl group). These are the conjugate bases of amines, and have pK<s

3 KB (410 words) - 02:51, 17 October 2013
Henry's law/Citable Version
:[[hydrogen]] (H2) : 1282.1 L·atm/mol     ...with the example numerical values presented for oxygen, carbon dioxide and hydrogen and with their corresponding dimensional units.

11 KB (1,729 words) - 05:20, 3 September 2013
Cerumen
...menolytic agents. These may be water-based (such as saline, acetic acid or hydrogen peroxide), oil-based (not true cerumenolytics), or other. No type is clearl

2 KB (377 words) - 11:46, 2 February 2023
Natural gas condensate
*[[Hydrogen sulphide]] (H2S} ...h and low pressure separators will probably need to be processed to remove hydrogen sulfide before the water can be disposed of or reused in some fashion.

7 KB (1,134 words) - 09:41, 6 March 2024
Periodic table of elements
...ce shell is in a so-called ''ns''-[[Hydrogen-like atom#Quantum numbers of hydrogen-like wave functions|orbital]]. In all these metals there is only one free e ...ents in that same group (column) will react. For instance [[carbon]] and [[hydrogen]] (H2) react to form [[methane]]. The bonds of the [[Carbon|carb

13 KB (2,075 words) - 09:16, 6 March 2024
Oxidation-reduction
(3) the transfer of an electron covalently bonded to a proton, namely, a hydrogen atom, from one chemical species to another. Here the hydrocarbon, [[ethane]] (H3C-CH3) loses two hydrogen atoms, hence two electrons, to form [[ethene]], an [[alkene]], the ethane u

16 KB (2,492 words) - 16:30, 7 August 2012
Atomic optical spectrometry
[[Hydrogen]]/[[air]] 2000-2100 [[Hydrogen]]/[[oxygen]] 2550-2700

6 KB (888 words) - 13:04, 12 April 2011
Zach Wamp
*Hydrogen and Fuel Cell Caucus

3 KB (369 words) - 15:40, 22 March 2023
Exothermic reaction
...from a smaller value (the energy used for the reaction). For example, when hydrogen burns:

3 KB (432 words) - 22:07, 29 October 2020
Petroleum refining processes/Citable Version
*[[Hydrodesulfurization|Naphtha Hydrotreater]] unit: Uses [[hydrogen]] to desulfurize the [[petroleum naphtha|naphtha]] fraction from the crude *[[Hydrodesulfurization|Distillate Hydrotreater]] unit: Uses hydrogen to desulfurize some of the other distilled fractions from the crude oil di

13 KB (1,952 words) - 09:37, 6 March 2024
Petrochemicals
...s are not to be confused with [[steam reforming]] plants used to produce [[hydrogen]] and [[Ammonia production|ammonia]]. (b) Includes [[hydrogen]], methane, butenes, non-aromatic portion of [[pyrolysis gasoline]] and [[f

9 KB (1,157 words) - 14:08, 2 February 2023
Neutrophil
...ich spontaneously or catalyzed by [[superoxide dismutase]] dismutates to [[hydrogen peroxide]], as per the following reaction: Hydrogen peroxide and [[chlorine|chloride]] are subsequently converted by the enzyme

7 KB (903 words) - 10:31, 10 June 2010
Chemical Weapons Convention/Schedules
|[[Hydrogen cyanide]]

5 KB (597 words) - 08:35, 24 January 2011
Merox/Citable Version
...lt in products which no longer have the sour, foul odors of mercaptans and hydrogen sulfide. The liquid hydrocarbon disulfides may remain in the sweetened prod The feedstock entering the extractor must be free of any hydrogen sulfide (H2S) gas. Otherwise, any H2S entering the ex

11 KB (1,728 words) - 09:37, 6 March 2024
Aqueous Wastes from Petroleum and Petrochemical Plants
...ay design of [[steam distillation]] columns for removing [[Gas|gaseous]] [[hydrogen sulphide]] from petroleum refinery wastewaters. Such columns are commonly r

3 KB (400 words) - 10:27, 13 March 2024
Neutron generator
...beam) are generated by the ions hitting the target, which has one or more hydrogen isotopes on its surface. <ref name=Sublette4.1>{{citation

6 KB (938 words) - 21:00, 5 May 2010
Petroleum refining processes
*[[Hydrodesulfurization|Naphtha Hydrotreater]] unit: Uses [[hydrogen]] to desulfurize the [[petroleum naphtha|naphtha]] fraction from the crude *[[Hydrodesulfurization|Distillate Hydrotreater]] unit: Uses hydrogen to desulfurize some of the other distilled fractions from the crude oil di

14 KB (2,061 words) - 09:37, 6 March 2024
Nova (astronomy)
...terial from its binary partner. Most of the material is hydrogen. When the hydrogen reaches the surface of the white dwarf, it ignites, creating a nuclear expl

6 KB (1,048 words) - 17:23, 26 July 2010
Henry's law
:[[hydrogen]] (H2) : 1282.1 L·atm/mol ...with the example numerical values presented for oxygen, carbon dioxide and hydrogen and with their corresponding dimensional units.

13 KB (2,084 words) - 05:21, 3 September 2013
Gas to liquid catalysis
...former or a gasifier to convert natural gas into [[carbon monoxide]] and [[hydrogen]], much as has been used in [[methanol]] and [[ammonia production]]. These

3 KB (424 words) - 14:47, 26 April 2010
Anion
<tr><td>[[Sulfide]]</td> <td>S2-</td> <td> Evolves [[hydrogen sulphide]] (H2S) gas when sulfuric acid is added; Reduces Fe(III

3 KB (610 words) - 09:37, 6 March 2024
Term symbol
* [[Hydrogen]] atom: <math>\scriptstyle 1s\,\,\, ^2S_{\frac{1}{2}}</math>. Spin angular

3 KB (467 words) - 01:09, 21 February 2010
Combustion
A simpler example is the combustion of [[hydrogen]] (H2) and oxygen, which is a commonly used reaction in [[rocket <center>'''hydrogen + oxygen → water vapor''' 

12 KB (1,825 words) - 17:36, 28 March 2021
Chemical compound/Catalogs/Inorganic compounds
*[[Hydrogen bromide]] – HBr *[[Hydrogen chloride]] – HCl

26 KB (3,687 words) - 09:47, 6 March 2024
Merox
...lt in products which no longer have the sour, foul odors of mercaptans and hydrogen sulfide. The liquid hydrocarbon disulfides may remain in the sweetened prod The feedstock entering the extractor must be free of any hydrogen sulfide (H2S) gas. Otherwise, any H2S entering the ex

12 KB (1,901 words) - 09:37, 6 March 2024
Atomic mass
..., in much the same way as when the sample consists of different compounds. Hydrogen chloride, for instance, would be seen as a mixture of the following isoto ...> 1 <td> [[Hydrogen|H]] <td width="5%" > [[Hydrogen/Atomic mass|{{:Hydrogen/Atomic mass}}]] <td width="15%"> <td align="left "> 38 <td> [[Stronti

18 KB (2,483 words) - 09:47, 6 March 2024
Auschwitz-Birkenau Concentration Camp
The gas chambers used [[Zyklon B]], a [[hydrogen cyanide]] preparation, rather than the [[carbon monoxide]] of other facilit

3 KB (435 words) - 03:13, 27 March 2024
Microbial metabolism
...omaticaceae (hydrogen sulfide as reducing equivalent donor), Chloroflexus (hydrogen as reducing equivalent donor) ..., Heliobacterium, Chloroflexus (alternatively to photolithoautotrophy with hydrogen)

29 KB (4,037 words) - 02:19, 7 March 2024
Electrolyte
...]s, a solid electrolyte connects the plates electrically while keeping the hydrogen and oxygen fuel gases separated.

3 KB (486 words) - 04:36, 7 October 2009
Oxidative stress
...species by taking electrons from it, or by taking an electron as part of a hydrogen atom (H∙), or by adding oxygen, as the electrons of the oxidized species ...g agent reduces another species by supplying electrons to it, by supplying hydrogen (H∙) or by removing oxygen.

31 KB (4,638 words) - 18:09, 29 October 2017
Protein/Related Articles
{{r|Hydrogen bond}}

4 KB (486 words) - 19:46, 11 January 2010
Fermentation (biochemistry)
...examples of fermentation products are [[ethanol]], [[lactic acid]], and [[hydrogen]]. However, more exotic compounds can be produced by fermentation, such as ...acid is not the primary causes for the drop in pH, but rather ATP-derived hydrogen ions. Inorganic phosphate that increases during fatigue due to breakdown of

8 KB (1,169 words) - 06:27, 9 June 2009
Amino acid
...]] [[monomer]] consisting of an [[amino group]], a [[carboxyl group]], a [[hydrogen]] atom, and a residual group (commonly denoted as simply "R") [[covalent bo

3 KB (443 words) - 21:24, 16 February 2010
Atomic hypothesis
...ticle of water; every particle of hydrogen is like every other particle of hydrogen, &c.''<ref>[http://web.lemoyne.edu/~giunta/dalton.html] excerpt from Dalton

7 KB (1,170 words) - 08:30, 6 May 2022
Molecule
...lecule]], can reach [[macroscopic]] sizes. The smallest molecule is the [[hydrogen]] molecule. The interatomic distance is 74 [[picometre]]s (0.74 [[Angstrom| ...ol]] (CH3CH2OH) is always composed of [[carbon]], [[hydrogen]], and [[oxygen]] in a 2:6:1 ratio, i.e., its empirical formula is C2<

11 KB (1,558 words) - 21:27, 10 November 2020
Law of multiple proportions (chemistry)/Bibliography
...hylene and methane, and found that methane contained exactly twice as much hydrogen as ethylene. Why this mathematical simplicity?....Again Dalton made models

3 KB (538 words) - 21:11, 4 June 2009
Chemistry
...her; such as the synthesis of [[water]] (H2O) from two gases: [[hydrogen]] (H2) and [[oxygen]] (O2). Some chemical interaction ...nough to be a gas. Note that in each case, energy is required to break the hydrogen bonds, as well as to further separate the molecules from each other.

23 KB (3,309 words) - 09:41, 6 March 2024
Molecular orbital
The two hydrogen atoms, labeled ''A'' and ''B'', each have one electron (a red arrow in the With regard to the form of the MOs the following: Because both hydrogen atoms are identical, the molecule has reflection symmetry with respect to a

8 KB (1,408 words) - 09:47, 24 April 2010
Matter (chemistry)/Addendum
...in generation of atomic energy, or energy to mass, as in the generation of hydrogen atoms from the energy released by the Big Bang that originated our universe

4 KB (613 words) - 20:17, 5 June 2011
Organosilicon
...otope labeling|isotopic]] [[desymmetrisation]] on the substrate (replacing hydrogen by [[isotope labeling|deuterium]]) it can be demonstrated that the reaction ...-H bond (105 compared to 148 pm) and weaker (338 compared to 299 KJ/mole). Hydrogen is more [[electronegative]] than silicon hence the naming convention of sil

9 KB (1,169 words) - 02:10, 27 October 2013
Matter (chemistry)
...a different form with a different set of properties, as, for example, when hydrogen atoms and oxygen atoms transform into liquid water, or when liquid water tr ...in generation of atomic energy, or energy to mass, as in the generation of hydrogen atoms from the energy released by the Big Bang that originated our universe

14 KB (2,271 words) - 17:17, 9 October 2013
Chemistry/Citable Version
...synthesis of [[water (molecule)|water]] (H2O) from two gases: [[hydrogen]] (H2) and [[oxygen]] (O2). Some chemical interaction ...nough to be a gas. Note that in each case, energy is required to break the hydrogen bonds, as well as to to further separate the molecules from each other.

22 KB (3,143 words) - 09:41, 6 March 2024
Scientific method/Bibliography
...ired to replace the hydrogen atom in HF (hydrogen fluoride) by a different hydrogen atom; and for others as well. The author, H. F. Schaefer, argued that good

14 KB (2,214 words) - 16:43, 14 July 2009
Phosphoric acid
...ating each of the three anions, those formed with dihydrogen phosphate and hydrogen phosphate decompose upon heating, producing a metal [[trimetaphosphate]],M<

4 KB (532 words) - 23:27, 20 February 2010
USS Los Angeles (ZR-3)
...[[Maurice R. Pierce]] in command. The airship was also switched over from hydrogen to helium gas, which reduced payload but improved safety.

3 KB (538 words) - 10:06, 10 February 2023
Thermal airship
Hot air craft produce much less lift per unit volume than Helium or Hydrogen filled craft (about 30% depending on air conditions)

4 KB (586 words) - 06:17, 12 September 2013
Organic chemistry
...s|synthesis]] or by other means) of chemical compounds of [[carbon]] and [[hydrogen]], which may contain any number of other elements, such as [[nitrogen]], [[ ...s simplicity without introducing ambiguity, whilst representing carbon and hydrogen by implication. The disadvantage which arises from the fact that structural

21 KB (3,107 words) - 09:16, 6 March 2024
James D. Watson
....gov/pmc/articles/PMC1063337/?tool=pmcentrez The Structure of Proteins Two Hydrogen-Bonded Helical Configurations of the Polypeptide Chain]. Proc Natl Acad Sci ...mystery was the question of how the nucleotides were bonded together, via hydrogen bonds or salt linkages from negatively charged phosphate groups.

8 KB (1,287 words) - 10:14, 27 December 2020
Thylakoid/Citable Version
...cular complexes that mediate electron flow from water to carbohydratess or hydrogen gas are present the electron-transport chain found in the thylakoid membran

9 KB (1,262 words) - 16:26, 23 September 2013
Thylakoid
...ecular complexes that mediate electron flow from water to carbohydrates or hydrogen gas are present the electron-transport chain found in the thylakoid membran

9 KB (1,262 words) - 09:17, 11 October 2013
Air
|[[Hydrogen]]|| align="center"|H2|| align="center"|0.000050|| align="center" ...temperature as well as a [[catalyst]] to combine atmospheric nitrogen and hydrogen to form ammonia which can be used directly as fertilizer or processed furth

12 KB (1,867 words) - 08:51, 30 June 2023
Hindenburg (LZ-129)
...of the airship to use [[hydrogen]] as the lift gas, despite the fact that hydrogen, unlike helium, is extremely flammable.<ref name="botting"> Botting 2001, p ...zeppelins, so the switch from helium to hydrogen did not cause much alarm. Hydrogen also gave the craft about 8% more lift capacity.

26 KB (4,090 words) - 07:31, 20 April 2024
Classification of rigid rotors
[[carbon dioxide]] (O=C=O), [[hydrogen cyanide]] (HC≡N), and [[carbonyl sulfide]] (O=C=S). Examples of larger l

5 KB (704 words) - 05:59, 26 September 2007
Water
'''Water''' is a [[chemical compound]] composed of [[hydrogen]] and [[oxygen]] and has the [[chemical formula]] (H2O or HOH). ...nd outermost) shell, which has a natural capacity of eight electrons. Two hydrogen atoms can thus share electrons with one oxygen atom, filling their respecti

24 KB (3,756 words) - 01:56, 29 April 2021
Acidosis
...content of the blood and body tissues, and characterized by an increase in hydrogen ion concentration (decrease in pH). (Dorland, 27th ed)."<ref>{{MeSH}}</ref>

4 KB (527 words) - 06:23, 5 February 2011
Oxygen
...he third most abundant [[Chemical element|element]] in the universe (after hydrogen and helium) and the most abundant element of the [[lithosphere]] (about 47% ...t is electron transport from cathode to anode and the formation of gaseous hydrogen at the cathode and gaseous oxygen at the anode. This process, which require

12 KB (1,791 words) - 05:43, 6 March 2024
Molecular structure of Nucleic Acids
...atson and Crick soon produced their [[double helix]] model of DNA with the hydrogen bonds at the core of the helix providing a way to unzip the two complementa ...a DNA molecule. Just pull apart the two phosphate backbones, each with its hydrogen bonded A, T, G, and C components. Each strand could then be used as a templ

13 KB (2,038 words) - 06:56, 9 June 2009
Thiomargarita namibiensis
...ranules found in the cytoplasm of this organism is due to the oxidation of hydrogen sulfide in to sulfur. ''Thiomargarita namibiensis'' is a non-motile organis

5 KB (690 words) - 05:33, 28 November 2013
Gaussian type orbitals
...(see [[Hydrogen-like atom#Quantum numbers of hydrogen-like wave functions|hydrogen-like atom]] for the meaning of ''p'' and ''l'' ) can be found as linear co

15 KB (2,490 words) - 12:23, 19 April 2009
Salmonella enterica
...d shaped bacteria that contain [[peritrichous]] [[flagella]] and produce [[hydrogen sulphide]]. Important molecules that they produce once inside their hosts a ...hey contained three membrane associated [[enzymes]] that helped break down hydrogen.

20 KB (3,123 words) - 09:37, 6 March 2024
Proxima Centauri (star)
...Centauri is a very active variable star. As a star of low mass it converts hydrogen to helium very slowly compared to our own star. Sol. This slow conversion c

5 KB (794 words) - 18:54, 20 December 2007
Chemical weapon
...bers used carbon monoxide, for large scale use, they used a preparation of hydrogen cyanide, adsorbed onto inert material forming a pesticide product called Zy ...ydrogen cyanide and cyanogen chloride are quite lethal in confined spaces; hydrogen cyanide was the principal lethal agent used in Nazi genocide. It is quite d

14 KB (2,220 words) - 07:28, 18 March 2024
Molar gas constant
* ''Hydrogen (molecular mass of 2.016 g · mol–1)'' : '''''R'''''s</s

5 KB (821 words) - 16:14, 14 October 2013
Los Alamos National Laboratory
...me known as [[Fusion device|thermonuclear]] weapons (also referred to as [[hydrogen bomb]]s or [[H-bomb]]s). Thermonuclear weapons are based on the energy rele ...astle Bravo H-Bomb, 1954.jpg|left|230px|Fireball of Castle Bravo 1 megaton hydrogen bomb test at Bikini Atoll, March 1, 1954}}

19 KB (2,853 words) - 09:20, 22 April 2024
Antibacterial
...an and deodorize wounds and [[ulcer]]s. More common 1% or 2% solutions of hydrogen peroxide have been used in household first aid for scrapes, etc. However,

9 KB (1,302 words) - 19:31, 11 February 2010
Galaxy (astronomy)
...r structure]] in the center of the Galaxy. With improved radio telescopes, hydrogen gas could also be traced in other galaxies. In the 1970s it was discovered .... However, the supply of star-forming material is finite; as stars convert hydrogen into heavier elements, fewer stars will form.

17 KB (2,688 words) - 22:56, 16 January 2021
Catalysis
...d hydrocarbons]] ([[Hydrocarbon|alkenes]]) by reacting them with gaseous [[hydrogen]] (H2) to produce liquid [[Hydrocarbon|saturated hydrocarbons]] *[[Claus process]]: Convering gaseous [[hydrogen sulphide]] into elemental [[sulphur]]

21 KB (3,174 words) - 07:31, 20 April 2024
Atomic units
The Bohr radius was the distance of an electron from the nucleus of a hydrogen atom predicted by the Bohr theory of the atom, which required an integer nu ...dius is the distance of maximum likelihood for finding the electron in the hydrogen atom in its ground state. <ref name=Demtröder>

13 KB (1,945 words) - 19:19, 1 June 2022
Cobalt(II) oxide
Cobalt(II) oxide rapidly decomposes hydrogen peroxide and oxidizes the drying of unsaturated oils in an exothermic react

5 KB (712 words) - 21:11, 22 February 2009
Chemical symbol/Catalogs
<tr><td> H <td> [[Hydrogen]] <td align="right"> 1

8 KB (1,135 words) - 09:15, 6 March 2024
Chemical bond
...N2) and a [[hydrogen]] atom with a [[fluorine]] atom forming [[hydrogen fluoride]] (HF). As an example of larger complexes, [[carbon]] (C) and [ ...e very common in [[organic chemistry]]. They occur between, for instance, hydrogen, carbon, nitrogen, and oxygen atoms and give rise to stable, recognizable,

37 KB (5,836 words) - 05:36, 6 March 2024
Halogen
[[hydrohalic acid|Hydrohalic acids]], diatomic compounds of one hydrogen atom and one halogen atom, are particularly strong acids owing to high halo

6 KB (813 words) - 06:00, 6 March 2024
Schrödinger equation
...tor (quantum)|harmonic oscillator]]s). A more complex system even is the [[Hydrogen |H2]] molecule where only approximations to the solutions can be * The [[hydrogen atom]] or [[hydrogen-like atom]]

17 KB (2,678 words) - 10:12, 9 May 2011
Natural gas/Citable Version
...n important fuel source and a major feedstock for producing [[ammonia]], [[hydrogen]], [[petrochemicals]] and [[fertilizer]]s. *[[Acid gas]]es: [[carbon dioxide]] (CO2), [[hydrogen sulphide]] (H2S) and [[mercaptan]]s such as [[methanethiol]] (CH

26 KB (3,931 words) - 09:37, 6 March 2024
Natural gas
...n important fuel source and a major feedstock for producing [[ammonia]], [[hydrogen]], [[petrochemicals]] and [[fertilizer]]s. *[[Acid gas]]es: [[carbon dioxide]] (CO2), [[hydrogen sulphide]] (H2S) and [[mercaptan]]s such as [[methanethiol]] (CH

26 KB (3,927 words) - 09:37, 6 March 2024
Coal
...are the same in every respect. In general, coal consists of [[carbon]], [[hydrogen]], [[oxygen]], [[nitrogen]], [[sulphur]] and [[mineral]] matter (including ...oisture and ash. It is composed primarily of carbon with lesser amounts of hydrogen, nitrogen and sulfur.

20 KB (3,084 words) - 09:16, 6 March 2024
Air stripping
...r, and the removal of gases such as [[ammonia]], [[carbon dioxide]] and [[hydrogen sulphide]] from water. ...opylene glycol dimethyl ether) to absorb and remove [[acid gas]]es such as hydrogen sulfide and/or carbon dioxide from gas streams. The solvent is then strippe

11 KB (1,664 words) - 09:37, 6 March 2024
Magnetic resonance imaging
...ase of medical MRI, the most commonly used nucleus is the nucleus of the [[hydrogen]] [[atom]]. Most biomedical MR images are essentially plots showing the dis Atoms with an odd number of [[nucleon]]s (protons and neutrons), such as [[hydrogen]] and [[carbon]]-13 (but not carbon-12!) possess an intrinsic degree of fre

10 KB (1,408 words) - 04:54, 21 March 2024
Avogadro's number
...proportions. For instance, 1 liter of oxygen gas combines with 2 liters of hydrogen gas to form 2 liter of gaseous water. Especially Gay-Lussac's law was of gr ...ad assumed earlier that water is formed from a molecule each of oxygen and hydrogen, rejects Avogadro's and Gay-Lussac's laws.

19 KB (2,947 words) - 20:20, 27 December 2020
TOI-561
...-561 has an extremely low abundance of metals, or any element heavier than hydrogen or helium, and is very old; Weiss calculates an age of roughly 10 billion y ...believed to be far too small and irradiated to hold onto its primordial [[Hydrogen]] and [[Helium]] envelope. However, the composition of the planet varies gr

13 KB (1,765 words) - 11:12, 23 July 2022
Pyrococcus furiosus
* Silva PJ ''et al.'' (2000) Enzymes of hydrogen metabolism in Pyrococcus furiosus. [http://dx.doi.org/10.1046/j.1432-1327.2

5 KB (616 words) - 05:04, 1 February 2008
USS Shenandoah (ZR-1)
...it in that it was the first rigid airship to use [[helium]] rather than [[hydrogen]]. A similar precaution might have prevented the [[Hindenburg disaster]] tw ...rship contained [[helium]], which does not react chemically with air. If [[hydrogen]] had been used, the ship probably would have burned - as the ''[[LZ 129 Hi

10 KB (1,528 words) - 09:44, 5 August 2023
Beta oxidation
...The enzyme [[catalase]], found exclusively in peroxisomes, converts the [[hydrogen peroxide]] into [[water]] and [[oxygen]].

5 KB (813 words) - 16:55, 8 May 2010
Airship
...a level). The primary advantage of helium is that it non-flammable whereas hydrogen burns readily in air. ...filled with hydrogen. Nonetheless, some small experimental ships still use hydrogen today.

23 KB (3,524 words) - 07:41, 12 April 2014
Vacuum (partial)
...truly perfect, not even in interstellar space, where there are still a few hydrogen atoms per cubic centimetre.<ref name=Tadokoro>{{cite journal

5 KB (754 words) - 15:12, 4 August 2011
Vinegar
...of [[pneumonia]]. A mixture of five-percent acetic acid and three-percent hydrogen peroxide is commonly used.

18 KB (2,906 words) - 10:10, 28 February 2024
Memory of water
...><ref>Elsaesser T (2009) Ultrafast memory loss and relaxation processes in hydrogen-bonded systems ''Biol Chem'' 390:1125-32 (Review) PMID 19663683</ref><ref>K ...ared with pure water. Rey claimed that this suggested that the networks of hydrogen bonds in homeopathic dilutions were different. <ref>Rey L (2003)Thermolumin

18 KB (2,650 words) - 03:19, 25 June 2019
Boiling point
...ng point of the compound. Simple [[carboxylic acid]]s dimerize by forming hydrogen bonds between molecules. A minor factor affecting boiling points is the sh

15 KB (2,372 words) - 00:31, 28 October 2013
Boiling point/Citable Version
...ng point of the compound. Simple [[carboxylic acid]]s dimerize by forming hydrogen bonds between molecules. A minor factor affecting boiling points is the sh

15 KB (2,373 words) - 19:13, 5 August 2018
Biomass
...n]] and/or [[air]]) to produce a mixture of [[carbon monoxide]] (CO) and [[hydrogen]] (H2) commonly called ''syngas'' (a contraction of ''synthesis ...syngas may be directly burned as a fuel, converted into methyl alcohol or hydrogen, subjected to [[methanation]] to produce [[synthetic natural gas]] (SNG),<r

17 KB (2,437 words) - 02:47, 21 March 2024
Crude oil desalter
...n]] towers (called [[sour water strippers]]) to strip virtually all of the hydrogen sulfide and somewhat less of the ammonia from aggregated sour waters.<ref n

12 KB (1,965 words) - 09:37, 6 March 2024
Mole (unit)
Further examples: a mole of [[hydrogen]] molecule, standard atomic weight of H is 1.00794, has the mass 2×1.

5 KB (914 words) - 14:09, 2 February 2023
Gas compressor
Diaphragm compressors are used for hydrogen and compressed natural gas ([[Compressed natural gas|CNG]]) as well as in a ...[[hydrogen]] gas to 6,000 psi (41 MPa) for use in a prototype [[compressed hydrogen]] and [[compressed natural gas]] (CNG) fueling station built in downtown [[

17 KB (2,493 words) - 19:22, 17 February 2010
Radioactivity
...itively charged particles, [[proton]]s and—with the exception of the hydrogen nucleus—one or more electrically neutral particles, [[neutron]]s. The

5 KB (827 words) - 17:02, 22 March 2024
Integral Fast Reactor
...mpacting the neutron economy. Steel does not suffer the rapid oxidation or hydrogen generation at high temperature that zirconium alloys do. If there is a clad

12 KB (1,882 words) - 11:17, 21 April 2024
Kidney
| Proximal convulated tubule || 40% || Carbonic anhydrase [[Sodium-hydrogen antiporter]] ([[Ion pump]]) || Carbonic anhydrase inhibitors

6 KB (806 words) - 10:40, 24 July 2008
Calcium
|hazard=Reacts violently with water and acids to release explosive hydrogen,

6 KB (899 words) - 11:12, 20 November 2022
Planet
...densities of 1.3 and 0.69 g/cc, respectively. Composed mainly of the gases hydrogen and helium. ...methane, and ammonia, with a small rocky core and an atmosphere of mostly hydrogen and helium.

12 KB (1,829 words) - 10:07, 10 January 2021
Fusion device
...greater amounts of energy by joining the nuclei of lighter elements (e.g., hydrogen isotopes) into a heavier one (e.g.,helium). | title = Dark Sun: the Making of the Hydrogen Bomb

20 KB (3,072 words) - 10:33, 18 March 2024
Jupiter (planet)
It is composed largely of [[hydrogen]] and [[helium]]. Jupiter's strong internal heat creates a number of semi-

6 KB (921 words) - 08:26, 10 January 2021
Nitrogen cycle
...hich have the nitrogenase [[enzyme]] that combines gaseous nitrogen with [[hydrogen]] to produce [[ammonia]], which is then further converted by the bacteria t ...reat pressure at 600°C, and using a [[catalyst]], atmospheric nitrogen and hydrogen (usually derived from [[natural gas]] or [[petroleum]]) can be combined to

21 KB (3,189 words) - 15:35, 3 September 2010
Carbon monoxide
...ed by the hydroformylation reaction of [[alkene]]s, carbon monoxide, and [[hydrogen]]. Hydroformylation is coupled to Shell Chemical's Higher Olefin Process (S ...ammatory responses in the body (the other two being [[nitric oxide]] and [[hydrogen sulphide]]), carbon monoxide has received a considerable attention as a bio

17 KB (2,453 words) - 09:37, 6 March 2024
Chemical reaction rate
The reaction is first order in H2, as the hydrogen concentration is raised to the power of 1; it is second order in NO, accord

7 KB (1,127 words) - 05:54, 31 October 2011
Quantum mechanics/Advanced
...iscrete mathematics|discrete]] (e.g., the energy of an electron bound to a hydrogen atom). ...ial energy]]. The article on the [[Stark effect]] treats the example of a hydrogen atom in an external electric field.

37 KB (5,578 words) - 04:54, 21 March 2024
Edward Teller
...of his role as an advocate and conceptual designer of the [[fusion device|hydrogen bomb]], his outspoken defense of an unassailable nuclear arsenal, and suppo ...Teller, Zeitschrift für Physik, ''Über das Wasserstoffmolekülion'' [On the hydrogen molecule ion], vol. '''61''', pp. 458–480 (1930)</ref>

28 KB (4,424 words) - 07:32, 20 April 2024
Neptune (planet)
...the upper layers of the atmosphere. Neptune is comprised predominantly of hydrogen and helium. However, its methane component reaches the upper atmosphere ab

6 KB (904 words) - 19:12, 9 January 2021
Benchmark quantities
...densest solids and the lightest gas, which is about 250,000 for osmium vs. hydrogen at atmospheric pressure and room temperature. The number of hydrogen atoms in 1 gram, or the number of carbon-12 atoms in 12 grams

45 KB (6,572 words) - 12:36, 9 March 2024
John Dalton
...hylene and methane, and found that methane contained exactly twice as much hydrogen as ethylene. Why this mathematical simplicity? <ref name=jaffe76>Jaffe B. ( ...tomic weights of different elements — relative to the unit weight of hydrogen.

26 KB (4,140 words) - 06:36, 6 March 2024
Nobel Prize in Physics/Catalogs
<td rowspan="1"> For the fine structure of the hydrogen spectrum ...wspan="1"> For elementary particle physics, discovery of resonance states, hydrogen bubble chamber and data analysis

30 KB (3,679 words) - 09:07, 12 October 2013
Phosphorus/Citable Version
...The unpaired electrons in the three 3''p'' orbitals bind with those in the hydrogen 1''s'' orbitals to form electron pairs of opposite [[spin]]. The electron p ...tructures with the phosphorus or arsenic atom in the center bound to three hydrogen atoms and one lone electron pair. Both are colorless, ill-smelling, toxic

19 KB (2,983 words) - 05:36, 6 March 2024
Phosphorus
...The unpaired electrons in the three 3''p'' orbitals bind with those in the hydrogen 1''s'' orbitals to form electron pairs of opposite [[spin]]. The electron p ...tructures with the phosphorus or arsenic atom in the center bound to three hydrogen atoms and one lone electron pair. Both are colorless, ill-smelling, toxic

19 KB (2,982 words) - 05:36, 6 March 2024
Star
...star burns [[hydrogen]] in a process that synthesises [[helium]]. When the hydrogen is consumed, the helium is then burned and that in turn synthesises carbon.

14 KB (2,338 words) - 10:18, 23 November 2011
Atom (science)
=== Bohr's model of the Hydrogen Atom ===

18 KB (2,789 words) - 20:34, 27 October 2020
Metabolism
...nosine triphosphate + water → Adenosine diphosphate + phosphate ion + hydrogen ion ...the biosynthesis of [[fatty acid]]s. Reducing power is usually supplied as hydrogen equivalents carried by [[NADPH]]. Organisms can be classified according to

14 KB (2,059 words) - 12:47, 6 September 2013
Metabolism/Citable Version
...nosine triphosphate + water → Adenosine diphosphate + phosphate ion + hydrogen ion ...the biosynthesis of [[fatty acid]]s. Reducing power is usually supplied as hydrogen equivalents carried by [[NADPH]]. Organisms can be classified according to

14 KB (2,063 words) - 12:41, 6 September 2013
Macromolecular chemistry/Citable Version
...and the [[oxygen|O]] are bound by a double bond, the [[Nitrogen|N]] and [[Hydrogen|H]] with a single bond, the combination is a [[carbonyl group]]). The amino ...here all bonds between the carbon atoms have been completely saturated (by hydrogen). The simplest hydrocarbon is [[methane]] (CH4); methane is a [[

36 KB (5,455 words) - 11:49, 6 September 2013
Macromolecular chemistry
...and the [[oxygen|O]] are bound by a double bond, the [[Nitrogen|N]] and [[Hydrogen|H]] with a single bond, the combination is a [[carbonyl group]]). The amino ...here all bonds between the carbon atoms have been completely saturated (by hydrogen). The simplest hydrocarbon is [[methane]] (CH4); methane is a [[

36 KB (5,455 words) - 08:57, 12 September 2013
Nuclear chemistry
...diation. An example is the conversion of water into [[hydrogen]] gas and [[hydrogen peroxide]]. ...the formation of organic waste which contains elements other than carbon, hydrogen, nitrogen and oxygen. Such an organic waste can be burned without forming a

31 KB (4,881 words) - 12:55, 15 March 2024
Expansion turbine
...drogen.energy.gov/pdfs/progress05/v_e_1_shimko.pdf US Department of Energy Hydrogen Program]</ref> and other low-temperature processes. ...s amounts of [[acid gas]]es such as [[carbon dioxide]] (CO2), [[hydrogen sulphide]] (H2S) and [[mercaptan]]s such as [[methanethiol]] (CH

16 KB (2,411 words) - 09:37, 6 March 2024
Fatty acid metabolism
...The enzyme [[catalase]], found exclusively in peroxisomes, converts the [[hydrogen peroxide]] into [[water]] and [[oxygen]]. Acyl-CoA entry into the peroxisso

7 KB (1,029 words) - 16:31, 25 March 2010
Viking 1
...about 2.4 m/s. The landing rockets used an 18 nozzle design to spread the hydrogen and nitrogen exhaust over a wide area. It was determined that this would li

6 KB (935 words) - 07:34, 9 June 2009
NMR spectroscopy/Catalogs/Magnetic nuclei
<tr><td>[[Hydrogen]]</td><td>1H</td><td>1/2</td><td>1.000000</td>

12 KB (1,860 words) - 09:15, 6 March 2024
Glycol dehydration
...This liquid water phase may contain some amount of [[acid gas]], such as [[hydrogen sulphide]] (H2S) or [[carbon dioxide]] (CO2) and can

8 KB (1,255 words) - 09:37, 6 March 2024
Rocket engine
...stem has advantages and disadvantages. The highest-energy mixes, such as [[hydrogen]] and [[oxygen]], use [[cryogenic]] (intensely cold) liquids, which are di ...from the main reaction. For example, the [[V-2]] pumps used concentrated [[hydrogen peroxide]] breakdown to produce a gas stream that ran pumps for the [[liqui

16 KB (2,555 words) - 02:46, 13 March 2024
Gas
*Diatomic elemental gases: [[hydrogen]] (H2), [[oxygen]](O2), [[nitrogen]] (N2),

8 KB (1,191 words) - 19:28, 22 January 2011
ThorCon nuclear reactor
...production of zero-carbon hydrogen from water.</ref> could provide "green hydrogen"<ref>The [https://art.inl.gov/NGNP/Subcontractors%20Documents/General%20Ato

16 KB (2,447 words) - 17:25, 22 April 2024
Chemical elements
...s. Thus, water is not an element because it can be split into the elements hydrogen and oxygen. Further dividing is not possible ''by simple means''.<re ...g the 94 naturally occurring chemical elements, the atoms of the element [[hydrogen]], Z=1, have the fewest number of protons, and those of the element [[pluto

39 KB (5,559 words) - 09:16, 6 March 2024
Intermolecular forces
Molecules such a [[hydrogen chloride]] (HCl) and [[water]] (H2O) lack an inversion center an ...sup>0 degree, the negative chlorine atom comes close to the positive hydrogen atom of the other monomer and there is an attraction of 0.97 kJ/mol.

56 KB (8,720 words) - 07:31, 20 April 2024
Antoine-Laurent Lavoisier
...firmed the earlier discovery of [[Henry Cavendish]] that the reaction of [[hydrogen]] with oxygen gives pure [[water]] and he gave the correct interpretation o ...2). Lavoisier interpreted this correctly as the oxidization of hydrogen by oxygen, confirmed the experiment in his laboratory,

19 KB (3,011 words) - 06:49, 5 October 2009
Molten salt reactor
...ydrogen explosions (like what happened in the [[Fukushima nuclear disaster#Hydrogen explosions|Fukushima nuclear disaster]]) that are at risk in conventional ( ...ation efficiency]], the possibility of grid-storage facilities, economical hydrogen production, and, in some cases, process-heat opportunities. Relevant design

38 KB (5,549 words) - 12:55, 15 March 2024
Steam generator/Citable Version
...abundance in the oceans of [[Earth]] of approximately one atom in 6500 of hydrogen (~154 PPM).</ref> About 65% of the total power generated by nuclear power p

31 KB (4,959 words) - 15:21, 8 April 2023
Steam generator
...abundance in the oceans of [[Earth]] of approximately one atom in 6500 of hydrogen (~154 PPM).</ref> About 65% of the total power generated by nuclear power p

31 KB (4,959 words) - 15:20, 8 April 2023
Uranus (planet)
The atmosphere is composed of mainly of [[hydrogen]] and [[helium]] and has a temperature of about -216 °C.<ref> -357 °F; 57

8 KB (1,202 words) - 08:50, 10 January 2021
Air pollution emissions
*''Geysers:'' The air pollutants emitted by geysers include [[hydrogen sulphide]], [[arsenic]] and other [[heavy metal]]s.

8 KB (1,251 words) - 09:37, 6 March 2024
Neutron activation analysis
By examining both ratios of major elements (e.g., carbon, hydrogen, oxygen, nitrogen) as well as the presence of trace elements, NAA, even tho

8 KB (1,189 words) - 06:39, 12 September 2013
Trichomonas vaginalis
...Instead of mitochondria they have a hydrogenosome that generate molecular hydrogen and produce ATP, among its many functions. All the members of Archezoa are ...in the cytoplasm. This is followed by converting pyruvate and malate to [[hydrogen]] and acetate. It is thought that the hydrogenosome arose before the [[mito

16 KB (2,181 words) - 02:17, 17 October 2013
Variable star
...or ''G'' that are rich in [[carbon]] and [[helium]] content but poor in [[hydrogen]]. ...'helium flash'' which happens when a relatively low mass star exhausts the hydrogen in its core and starts the helium-to-carbon conversion in its interior inst

18 KB (2,830 words) - 10:19, 9 June 2008
Big Bang
...minous emission nebulae, gas clouds, with the emission spectrum of ionized hydrogen</ref> for stars in some galaxies leading him to some incorrect conclusions. ...heory accounts for the abundant distribution of the light nuclear isotopes hydrogen, deuterium, helium-3, helium-

17 KB (2,731 words) - 19:52, 26 October 2020
Quantum chemistry
...at of the German physicists [[Walter Heitler]] and [[Fritz London]] on the hydrogen (H2) molecule in 1927. Heitler and London's method was extended

9 KB (1,219 words) - 14:19, 19 October 2010
Saturn (planet)
...of helium releasing heat by friction as they fall down through the lighter hydrogen.

23 KB (3,601 words) - 18:46, 13 January 2021
Composting
...f several gases ([[methane]], small amounts of [[hydrogen sulphide]] and [[hydrogen]] gas...), resulting in bad smells.

20 KB (3,189 words) - 09:37, 6 March 2024
Post irradiation examination
...ode]] where instead of a metal [[anode]] reacting and dissolving it is the hydrogen gas which is consumed.

26 KB (4,299 words) - 04:37, 22 March 2014
Streptococcus pneumoniae
...s its own cells to release its contents. Other virulence factors include [[hydrogen peroxide]], pili, and choline binding protein.<ref>[http://www.textbookofba

9 KB (1,183 words) - 07:31, 15 September 2013
Cold fusion
...n device|hydrogen bomb]]. A number of nuclei fuse together in an exploding hydrogen bomb releasing enormous amounts of energy, but, unfortunately, this happens ...evidence to the contrary, they resolutely pursue their illusion of fusing hydrogen in a mason jar. . . . And a few scientists, captivated by [Fleischmann and

27 KB (4,108 words) - 00:45, 8 October 2013
Insulin resistance
...atoms per molecule of glucose times the atomic weights of: carbon (C) * 6, hydrogen (H) * 12, oxygen (O) * 6: (12 * 6) + (1 * 12) + (16 * 6) = ~180.2 

8 KB (1,179 words) - 17:37, 10 March 2014
Molecular Hamiltonian
...d on the full Coulomb Hamiltonian are restricted to small systems like the hydrogen molecule. ...olecule'', Rev. Mod. Phys. vol. '''35''', pp. 473-483 (1963)</ref> on the hydrogen molecule for an early application. In the great majority of computations o

31 KB (4,757 words) - 02:20, 27 October 2013
Flash radiography
| title = Dark Sun: the Making of the Hydrogen Bomb

9 KB (1,379 words) - 17:02, 22 March 2024
Glycolysis
...sequentially dehydrogenated as they pass through the cycle conserving the hydrogen equivalents via the reduction of NAD+ to NADH. NADH is ultimatel ...any of a variety of products with an organic molecule acting as the final hydrogen acceptor. For example, the [[bacterium|bacteria]] involved in making yogurt

21 KB (3,063 words) - 02:03, 2 June 2009
Rejuvenation (aging)
...nk UT, Sohal RS. | title=Relationship between mitochondrial superoxide and hydrogen peroxide production and longevity of mammalian species | journal=FREE RADIC

16 KB (2,439 words) - 14:29, 19 March 2023
Energy (science)
...tained in fossil fuels is [[hydrogen]]. The combustion reaction of gaseous hydrogen is main reaction occurring in a hydrogen bomb explosion:

43 KB (7,032 words) - 15:15, 15 August 2022
Chromobacterium violaceum
...se activity, uses pyruvates or derivatives of pyruvates as electrons and a hydrogen acceptor in the reoxidation of NADH.

8 KB (1,094 words) - 04:30, 16 December 2013
Lipid
...the dissolved nonpolar substance, since the polar molecules cannot form [[hydrogen bond]]s to the nonpolar molecule. Therefore, in an aqueous environment, the

10 KB (1,526 words) - 21:51, 3 February 2009
Symbiosis
...t on their internal symbionts for nutrition. The bacteria oxidize either [[hydrogen sulphide]] or methane which the host supplies to them. These worms were dis

10 KB (1,436 words) - 09:37, 6 March 2024
Galaxy rotation curve
...rian dynamics]].<ref>A. Bosma, "The distribution and kinematics of neutral hydrogen in spiral galaxies of various morphological types", PhD Thesis, Rejksuniver

10 KB (1,575 words) - 06:30, 9 June 2009
Poliovirus
...öm]] wide with [[icosahdral]] symmetry. Poliovirus is composed of carbon, hydrogen, nitrogen, oxygen, phosphorus and sulphur.

11 KB (1,588 words) - 14:48, 7 February 2009
Earth's atmosphere
|[[Hydrogen]]|| align="center"|H2|| align="center"|0.000050|| align="center" ...or (steam)]], nitrogen, methane, ammonia, carbon monoxide, carbon dioxide, hydrogen sulfide, sulfur dioxide, and other gases — a mixture much like that emitt

22 KB (3,363 words) - 19:40, 9 January 2021
Maximum life span
...nk UT, Sohal RS. | title=Relationship between mitochondrial superoxide and hydrogen peroxide production and longevity of mammalian species | journal=FREE RADIC

19 KB (2,674 words) - 03:05, 17 February 2010
Concentration
...ciation|dissociated]] into reactive solute species ([[Ion|ions]] such as [[Hydrogen|H]]+, [[Iron|Fe]]3+, or [[Chlorine|Cl]]− </sup

11 KB (1,787 words) - 11:47, 2 February 2023
Condensate polishing
...SO4) or [[hydrochloric acid]] (HCl), positively charged [[hydrogen]] ions (H+) are attached to sites on the ion exchange material.

11 KB (1,647 words) - 11:52, 2 February 2023
N1 rocket
...t delivered much more thrust. Even so, due to the Saturn V's use of liquid hydrogen propellant in its upper stages as opposed to the N1's use of kerosene in al ...the Saturn V launched about 130 tons. The US's earlier work with [[liquid hydrogen]] [[jet engine]]s allowed them the confidence to use this higher-performanc

18 KB (2,946 words) - 11:47, 2 February 2023
Johannes Diderik van der Waals/Citable Version
...guide during experiments which ultimately led to the [[liquefaction]] of [[hydrogen]] by [[James Dewar]] in 1898 and of [[helium]] by [[Heike Kamerlingh Onnes]

10 KB (1,520 words) - 09:14, 2 March 2024
Johannes Diderik van der Waals
...guide during experiments which ultimately led to the [[liquefaction]] of [[hydrogen]] by [[James Dewar]] in 1898 and of [[helium]] by [[Heike Kamerlingh Onnes]

10 KB (1,521 words) - 09:14, 2 March 2024
Proteus mirabilis
...to live in highly alkalinated environments. The bacterium also produces [[hydrogen sulfide gas]], which aids in forming clear films on growth media, which can

10 KB (1,444 words) - 03:49, 2 December 2010
Nuclear power reconsidered
...and fuels for the transportation sector.<ref name=Fig2imageB>Generation of hydrogen for fuel is possible with a [https://www.gen-4.org/gif/jcms/c_9362/vhtr Ver ...needing zero-carbon, high-temperature process heat, like the production of hydrogen from water and the refining of steel. See Figure 7. Power is limited, howev

23 KB (3,486 words) - 09:11, 19 April 2024
Year 2038 bug
...ears old, and it may last another five billion years before running out of hydrogen and turning into a white dwarf star.

9 KB (1,386 words) - 09:02, 2 March 2024
Petroleum crude oil
|[[Hydrogen]] ||align="center"|10 to 14 ...bons, with linear or branched chains, which contain only [[carbon]] and [[hydrogen]] atoms and have the general formula of CnH2n+2. They

30 KB (4,497 words) - 16:53, 12 March 2024
Choked flow
|align="center"|Hydrogen||align="center"|1.410||align="center"|1.899

12 KB (1,845 words) - 16:31, 10 February 2024
Jet engine
...al engine running by September 1937. Unlike Whittle's design, Ohain used [[hydrogen]] as fuel, supplied under external [[pressure]]. Their subsequent designs c ...Examples include RB545, Reaction Engines SABRE and ATREX. Requires liquid hydrogen fuel which has very low [[Density (chemistry)|density]] and heavily insulat

63 KB (9,748 words) - 13:17, 2 February 2023
Apollo Command-Service Module
...en tanks supplied the environmental control system and fuel cells, and the hydrogen tanks the fuel cells only. The fuel cells combine the two elements to gener

24 KB (3,494 words) - 07:31, 20 April 2024
Archive:Article of the Week
{{rpr|Hydrogen bond}} (7 Oct)

10 KB (1,530 words) - 05:06, 8 March 2024
IUPAC nomenclature of organic chemistry
Hydron is a generic term for hydrogen cation; protons, deuterons and tritons are all hydrons. ...re obtained by substituting another element or some functional group for a hydrogen.

25 KB (3,880 words) - 09:42, 28 September 2013
Welding
...e primary problems, and the solutions that developed included the use of [[hydrogen]], [[argon]], and [[helium]] as welding atmospheres.<ref name=Cary/> During ...ge products.<ref name=Weman/> Other arc welding processes include [[atomic hydrogen welding]], [[carbon arc welding]], [[electroslag welding]], [[electrogas we

41 KB (6,367 words) - 05:51, 12 September 2013
Zeppelin
...al separate balloons, or "cells", contained the [[lighter-than-air]] gas [[hydrogen]] or [[helium]]. Non-rigid airships do not have multiple gas cells. Motive ...aft machine-gun positions, and gas ventilation shafts which removed excess hydrogen for safety.

36 KB (5,621 words) - 07:33, 20 April 2024
Photosynthesis
...erview of steps involved in using light energy to produce carbohydrates or hydrogen. ...t chain, where they release energy. Some of the energy is used to create a hydrogen ion gradient across the thylakoid membrane that is used to drive ATP synthe

25 KB (3,545 words) - 17:36, 30 September 2018
Chemical engineering/Citable Version
...process for the [[Ammonia production|production of ammonia]] by combining hydrogen and [[nitrogen]] was first patented by a chemist, [[Fritz Haber]], in 1908.

13 KB (1,788 words) - 09:16, 6 March 2024
Streptococcus mutans
...tive and catalase negative, preventing it from catalyzing the breakdown of hydrogen peroxide to oxygen and water.

11 KB (1,619 words) - 17:36, 16 February 2010
Nuclear magnetic resonance/Catalogs/Magnetic nuclei
<tr><td>[[Hydrogen]]</td><td>1H</td><td>1/2</td><td>1.000000</td>

15 KB (2,459 words) - 17:02, 7 March 2024
Helicobacter pylori
...enase to obtain energy. Hydrogenase produces energy by oxidizing molecular hydrogen that is produced by the bacteria present in the intestine.<ref>[http://micr

12 KB (1,766 words) - 01:02, 2 November 2013
Feline squamous cell carcinoma
...otton balls, makeup sponges, or quilted cotton makeup pads, wetted with 3% hydrogen peroxide, can help. Dab, don't rub, and some scabs will break loose.

11 KB (1,557 words) - 00:26, 9 September 2010
DNA/Citable Version
...isting of two DNA strands coiled around each other, and held together by [[hydrogen bonds]] between bases. Because of the chemical nature of these bases, adeni ...tructure.png|right|thumb|280px|The two strands of DNA are held together by hydrogen bonds between bases. The sugars in the backbone are shown in light blue.]]

66 KB (9,714 words) - 18:35, 12 April 2018
Astronomy
...bservations can also detect diffuse interstellar [[gas]] such as neutral [[hydrogen]] (HI), which is important also for the study of the dynamics of [[galaxy|g ...the more rapidly it expends the hydrogen fuel in its core. Over time this hydrogen fuel is completely converted into helium and the star begins to [[Stellar e

46 KB (6,796 words) - 10:08, 28 February 2024
Atomic radius/Catalogs
| 1 || H || [[hydrogen]]

17 KB (2,246 words) - 09:16, 6 March 2024
Chemical engineering
...process for the [[Ammonia production|production of ammonia]] by combining hydrogen and [[nitrogen]] was first patented by a chemist, [[Fritz Haber]], in 1908.

14 KB (1,996 words) - 09:16, 6 March 2024
Fear of radiation/Debate Guide
"Perhaps the most extreme example of the unnecessary problems ... is hydrogen-3 or tritium. It is hard to imagine a less dangerous radioactive isotope th

11 KB (1,842 words) - 10:28, 19 March 2024
Diuretic
| Proximal convulated tubule || 40% || Carbonic anhydrase [[Sodium-hydrogen antiporter]] ([[Ion pump]]) || Carbonic anhydrase inhibitors

13 KB (1,669 words) - 07:45, 9 June 2014
Astrobiology
...hat included non-photosynthetic organisms that make organic compounds from hydrogen and other simple byproducts of aqueous weathering. This discovery has revol ...ntial source of energy in the form of dissolved gases such as hydrogen and hydrogen sulfide, and mechanisms by which reduced gases in solution can deliver ener

42 KB (6,267 words) - 20:40, 8 June 2010
Mutation
* [[Tautomerism]] - A base is changed by the repositioning of a [[hydrogen]] [[atom]].

13 KB (2,019 words) - 00:14, 11 November 2007
Milky Way
...5-[[Kiloparsec|kpc]] ring" that contains a large fraction of the molecular hydrogen present in the Galaxy, as well as most of the Milky Way's [[star formation] ...ear spiral arms; the compressional waves increase the density of molecular Hydrogen and protostars form as a result.

37 KB (5,756 words) - 13:14, 10 January 2021
Stellar classification (astrophysics)
! Hydrogen lines

15 KB (2,142 words) - 21:59, 7 November 2008
Bacillus anthracis
Has antibacterial killing mechanisms such as hydrogen [[peroxide formation]], [[defensin synthesis]], [[super oxide dismutase(SOD

13 KB (2,023 words) - 10:26, 27 March 2024
Ascorbic acid
...reactive oxygen species]]) such as the [[hydroxyl]] radical (formed from [[hydrogen peroxide]]), contain an unpaired [[electron]] and thus are highly reactive

13 KB (1,893 words) - 10:07, 28 February 2024
Molecular dipole
...both cases the direction of the dipole is determined by the fact that the hydrogen atom(s) is(are) slightly positive. Hence, in HCl the dipole points from Cl

17 KB (2,690 words) - 01:15, 22 September 2009
Radiochemistry
...'''uranium(VI)''' as electron acceptors while [[acetate]], [[glucose]], [[hydrogen]], [[lactate]], [[pyruvate]], [[succinate]], and [[xylose]] can act as elec

13 KB (2,007 words) - 09:16, 6 March 2024
Prime number
...ub>O, can be divided into its components, or "products", of H and two O, 1 hydrogen and 2 oxygen atoms. These are like the prime number factors. As elements, t

18 KB (2,917 words) - 10:27, 30 August 2014
Density (chemistry)
|[[Tin]]|| 7,310|| ||Liquid [[Hydrogen]]||68

14 KB (2,241 words) - 12:26, 26 October 2021
Robert Boyle
...re details about the discovery of the element) and the first to describe [[hydrogen]] gas. Although he was probably the first chemist in the modern sense of th

13 KB (2,087 words) - 09:16, 6 March 2024
Solar System
After 100 million years, the pressure and [[Density (chemistry)|density]] of hydrogen in the centre of the collapsing nebula became great enough for the [[protos ...as ice giants because their cores are believed to be made mostly of ices (hydrogen compounds).<ref> {{cite journal |last = Mummma | first = M. J. | coauthors

76 KB (11,605 words) - 21:48, 1 September 2020
Emergence (biology)
...ess, its ability to flow, etc., 'emerge' from the properties of oxygen and hydrogen and their organizational dynamics? Consider these questions: *Would we expect that oxygen and hydrogen interacting in accord with their known properties, enabling them to self-as

47 KB (6,881 words) - 10:00, 14 July 2015
Complex number/Citable Version
...al function might represent the attractive force between the nucleus of a hydrogen atom and an electron).

20 KB (3,304 words) - 17:11, 25 August 2013
Fluid catalytic cracking
...ene]]s, [[propane]] and [[propylene]], and lower molecular weight gases ([[hydrogen]], [[methane]], [[ethylene]] and [[ethane]]). Some FCC gas recovery units m |[[Hydrogen]] || 10-14%

31 KB (4,755 words) - 09:16, 6 March 2024
Born-Oppenheimer approximation
...mass ratio of electrons and nuclei. For instance the lightest nucleus, the hydrogen nucleus, is already 1836 times heavier than an electron. The method is name

20 KB (3,194 words) - 03:34, 8 November 2013
Thermus aquaticus
2) More hydrogen bonds and presence of other non-covalent bonds strengthen the protein struc

14 KB (2,080 words) - 07:00, 18 March 2014

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