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  • 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.
    177 bytes (20 words) - 15:03, 7 December 2008
  • 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
  • Ammonia production/Definition
    The processes for the manufacture of hydrogen (H<sub>2</sub>) and ammonia (NH<sub>3)</sub>.
    127 bytes (18 words) - 20:30, 25 September 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
  • 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]] (CO<sub>2</sub>), 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]] (H<sub>2</sub>S). Natural gas is usually considered sour if the ...amounts of [[acidic]] gases such as [[carbon dioxide]] (CO<sub>2</sub>) or hydrogen sulfide. Thus, carbon dioxide by itself is an acid gas but it is not a sour
    3 KB (430 words) - 09:44, 6 March 2024
  • Sour gas/Definition
    ...refinery byproduct gas, or any other gas containing significant amounts of hydrogen sulfide (H<sub>2</sub>S).
    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]] (NH<sub>3</sub>) 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]] (H<sub>2</sub>S) and [[carbon dioxide]] (CO<sub>2</sub>) from [[
    187 bytes (28 words) - 09:37, 6 March 2024
  • Ammonia
    ...monia''' is a [[chemical compound]] (NH<sub>3</sub>) 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
  • 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
  • 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
  • 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]]<sub>2</sub>[[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]] &mdash; 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 (H<sub>2</sub>0). 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}}
    1 KB (169 words) - 09:18, 6 March 2024
  • 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|H<sub>2</sub>O<sub>2</sub>]];
    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<sup>+</sup> means a hydrogen ion, and Ca<sup>2+</sup> 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]]<sub>3</sub>)<sub>4</sub>, used as a standard in <sup>1</sup>H 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<sub>&infin;</sub> = m<sub>e<
    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==
    7 KB (1,067 words) - 10:08, 28 February 2024
  • 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;</sub>'', 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]]<sub>2</sub>[[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 (CO<sub>3</sub><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 '''<sup>3</sup>H''', 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
  • Acid gas/Related Articles
    {{r|Hydrogen sulphide}}
    295 bytes (35 words) - 09:39, 6 March 2024
  • Sour 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 &mdash; measured as pH reduction or hydrogen ion concentration ([H<sup>+</sup>]) increase &mdash; 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]] (&nbsp;H<sub>2</sub>). 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. E<sub>h</sub> i
    3 KB (523 words) - 08:32, 13 February 2009
  • Heavy water
    ...<sub>2</sub>O''' [[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''<sup>2</sup> 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]]&mdash;one-electron&mdash;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]].
    12 KB (1,827 words) - 17:00, 7 March 2024
  • Paracelsus/Related Articles
    {{r|Hydrogen}}
    563 bytes (74 words) - 19:22, 11 January 2010
  • Polyatomic ion
    * A Hydroxide ion is made of one oxygen ion and one hydrogen ion: its chemical formula is (OH)<sup>-</sup>. It has a negative charge. * An [[Ammonium]] ion is made up of one nitrogen atom and four hydrogen atoms: its Chemical Formula is (NH<sub>4</sub>)<sup>+</sup>. It has a posit
    9 KB (1,524 words) - 10:20, 13 November 2007
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