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| + | {{sidebar element |
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| − | Helium is the second most common element in the universe after [[hydrogen]]. Helium is most commonly found in a [[star]] as a result of a [[nuclear reaction]] that causes [[hydrogen]] to decay into helium. |
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| + | | image = Liquid Helium, Silent Enemy.jpg |
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| + | | imagecap = A liquid helium pipeline |
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| + | | Name = Helium |
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| + | | Symbol = He |
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| + | | ANum = 2 |
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| + | }} |
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| + | '''Helium''' is a chemical [[element]], number 2 on the [[periodic table]]. It is the second most common element in the universe after [[hydrogen]]. Helium is the typical result of hydrogen [[Nuclear fusion|fusion]] inside [[stars]]. Helium is highly non-reactive, being the first of the noble [[gas]]es. |
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| + | Helium was a typical component for a [[class T nebula]], along with hydrogen and [[argon]]. ({{VOY|Tinker Tenor Doctor Spy}}) |
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| − | Although both elements are lighter than air on an [[M-Class]] planet, in most environments hydrogen is far to unstable to be safely used as a floatation device. This was discovered after several tragedies in the 20th century involving airships being destroyed when their [[hydrogen]] ignited and exploded. |
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| + | Liquid helium was used for the engines of {{EnterpriseNX}}. ({{ENT|Silent Enemy}}) Liquid helium was also used as a [[fusion reactor|reactor]] coolant in the [[Argus Array]]. ({{TNG|The Nth Degree}}) |
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| − | Atomic number - 2; Density g/mL 0.0001787; |
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| − | Atomic weight u 4.0026; Melting point K 0.95; |
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| − | Bonding radius A 0.93; Boiling point K 4.215; |
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| − | Atomic radius A 0.49; Heat of vaporization kJ/mol 0.0845; |
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| − | Ionization Potential V 24.587; Heat of fusion kJ/mol; |
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| − | Electronegativity; Specific heat J/gK 5.193; |
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| − | The oxide is unknown; Crystals are hexagonal. |
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| + | The species that docked with the [[automated repair station]] before ''Enterprise'' in [[2152]] lived in a liquid helium [[atmosphere]], with a [[temperature]] of −270 [[Celsius|°C]]. ({{ENT|Dead Stop}}) |
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| − | Electron config. : 1s2 |
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| + | Helium [[nuclear fusion|fusion]] enhancement was at the center of [[Doctor]] [[Timicin]]'s studies to re-vitalize the [[Kaelon sun]]. ({{TNG|Half a Life}}) |
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| + | An anomalous rogue [[comet]] investigated by the {{USS|Enterprise|NCC-1701-D|-D}} in [[2370]] had an outer layer of gaseous hydrogen and helium. ({{TNG|Masks}}) |
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| + | The destruction of the [[Caretaker's array]] by the {{USS|Voyager}} in [[2371]] left vapor consisting of hydrogen, helium, [[mercury (element)|mercury]], and argon. ({{VOY|The Voyager Conspiracy}}) |
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| + | The [[nucleogenic cloud being]] was composed mostly of hydrogen, helium, and [[hydroxyl radical]]s. ({{VOY|The Cloud}}) |
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| + | [[Trajis Lo-Tarik]], a hallucination created by [[Seven of Nine]] while ''Voyager'' was traversing a [[nebula]] in [[2374]], offered liquid helium in trade for a [[microfusion chamber]]. ({{VOY|One}}) |
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| + | == External links == |
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| + | * {{mbeta}} |
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| + | * {{Wikipedia}} |
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| + | |||
| + | [[Category:Elements]] |
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| + | [[pt-br:Hélio]] |
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| + | [[de:Helium]] |
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| + | [[ja:ヘリウム]] |
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| + | [[nl:Helium]] |
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| + | [[pt:Hélio]] |
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Revision as of 17:05, 12 January 2016
Helium is a chemical element, number 2 on the periodic table. It is the second most common element in the universe after hydrogen. Helium is the typical result of hydrogen fusion inside stars. Helium is highly non-reactive, being the first of the noble gases.
Helium was a typical component for a class T nebula, along with hydrogen and argon. (VOY: "Tinker Tenor Doctor Spy")
Liquid helium was used for the engines of Enterprise NX-01. (ENT: "Silent Enemy") Liquid helium was also used as a reactor coolant in the Argus Array. (TNG: "The Nth Degree")
The species that docked with the automated repair station before Enterprise in 2152 lived in a liquid helium atmosphere, with a temperature of −270 °C. (ENT: "Dead Stop")
Helium fusion enhancement was at the center of Doctor Timicin's studies to re-vitalize the Kaelon sun. (TNG: "Half a Life")
An anomalous rogue comet investigated by the USS Enterprise-D in 2370 had an outer layer of gaseous hydrogen and helium. (TNG: "Masks")
The destruction of the Caretaker's array by the USS Voyager in 2371 left vapor consisting of hydrogen, helium, mercury, and argon. (VOY: "The Voyager Conspiracy")
The nucleogenic cloud being was composed mostly of hydrogen, helium, and hydroxyl radicals. (VOY: "The Cloud")
Trajis Lo-Tarik, a hallucination created by Seven of Nine while Voyager was traversing a nebula in 2374, offered liquid helium in trade for a microfusion chamber. (VOY: "One")
External links
- Helium at Memory Beta, the wiki for licensed Star Trek works
- Helium at Wikipedia