(helium)
21Helium — otherusesHelium (He) is a colorless, odorless, tasteless, non toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the… …
22Helium — Eigenschaften …
23Helium-3 — Eigenschaften …
24Helium-4 — Eigenschaften …
25Hélium — Pour les articles homonymes, voir Helium (homonymie). Hélium Hydrogène ← Hélium → …
26Helium-3 — This article is about the elemental isotope. For the record label Helium 3, see Muse or A E Records .infobox isotope background = #F99 isotope name = Helium 3 alternate names =Helium 3,He 3 symbol =He mass number =3 mass =3.016 num neutrons =1… …
27helium — /hee lee euhm/, n. an inert, gaseous element present in the sun s atmosphere and in natural gas, and also occurring as a radioactive decomposition product, used as a substitute for flammable gases in dirigible balloons. Symbol: He; at. wt.:… …
28Hélium 3 — L’hélium 3, noté 3He, est l isotope de l hélium dont le nombre de masse est égal à 3 : son noyau atomique compte deux protons et un seul neutron, avec un spin 1/2+ pour une masse atomique de 3,0160293 g⋅mol 1. Cet isotope stable non… …
29Helium-4 — infobox isotope background = #F99 isotope name = Helium 4 alternate names =Helium 4,He 4 symbol =He mass number =4 mass =4.002602 num neutrons =2 num protons =2 abundance =99.999863% halflife =stable error halflife = text color = parent = parent… …
30Helium — Heliumgas * * * He|li|um 〈n.; s; unz.; chem. 〉 zu den Edelgasen gehörendes chem. Element, Ordnungszahl 2 [zu grch. helios „Sonne“] * * * He|li|um [griech. he̅̓lios = Sonne; ↑ ium (1)], das; s; Symbol: He: gasförmiges chem. Element aus Gruppe 18… …
