Search results

...normal [[boiling point]]s of the so-called permanent [[gases]] (such as [[helium]], [[hydrogen]], [[neon]], [[nitrogen]], [[oxygen]], and normal [[Earth's a ...element in cryogenics and is legally purchasable around the world. Liquid helium is also commonly used and allows for the lowest attainable temperatures to

{{r|Helium}}

..., about 51 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. .... For this reason, a simple Linde cycle cannot normally be used to liquefy helium, hydrogen and [[neon]].

..., about 51 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. .... For this reason, a simple Linde cycle cannot normally be used to liquefy helium, hydrogen and [[neon]].

...aluminium, calcium magnesium, and iron). The lightest elements, hydrogen, helium and lithium, were formed during the [[Big Bang]]. Heavier elements were cre ...omposition of interstellar matter, by mass, is about 70.4% hydrogen, 28.1% helium and 1.5% heavier elements, similar to the ratios measured in the Sun, other

{{r|Helium}}

...r Blimp N2A to Europe from 1972 to 1986. Includes a very complete list of helium airship (i.e. does not include hot air airships) [http://www.blimp-n2a.com/ ...u/english/products.html RosAero] — Russian airship company that makes both Helium and hot air airships

Auto-populated based on [[Special:WhatLinksHere/Helium]]. Needs checking by a human.

Red dwarfs [[Nuclear fusion|fuse]] [[hydrogen]] to [[helium]] via the [[Pp chain|proton-proton (PP) chain]]. Due to the low temperature ...]] model predicts the first generation of stars should have only hydrogen, helium and [[lithium]]. If such stars included red dwarfs, they should still be ob

{{tl|Selected Electronegativities|Hydrogen|Beryllium|Iron|Helium|Uranium|Neptunium|Lead}} {{tl|Selected melting points|Hydrogen|Beryllium|Iron|Helium|Uranium|Neptunium|Lead|Cobalt(II) oxide}}

2 He [[Helium]] · 2 He [[Helium (element)|Helium]] ·

...egularities that were observed in the spectra of atomic [[hydrogen]] and [[helium]]. Initially they thought that electrons rotate physically about an axis, h

...the next rigid airship to enter Navy service, was at first filled with the helium from the ''Shenandoah'' until more could be procured. ...men who would handle and supply the airship were added; facilities for the helium, [[gasoline]], and other supplies necessary for ''Shenandoah'' were built;

* [[Helium/Video]]

|[[Helium |{{Noble off |noble color={{{noble color}}} }} ]]

|{{Periodic cell | eName = Helium | eSym = He}}

or to a helium isotope and emit a neutron:

{{r|Helium}}

...he looming war prevented German access to the required large quantities of helium, leading to the conversion of the Hindenburg to a hydrogen design. However

*Monatomic elemental gases: [[helium]] (He), [[neon]] (Ne), [[argon]] (Ar), [[krypton]] (Kr) and [[xenon]] (Xe) ...ve extremely low reactivity. The six naturally occurring noble gases are [[helium]] (He), [[neon]] (Ne), [[argon]] (Ar), [[krypton]] (Kr), [[xenon]] (Xe), an