HELIUM

CAS NO: 7440-59-7
Molecular Formula: He
Molecular Weight: 4

Synonyms

He

HELIUM

Helium-4

o-Helium

p-helium

heliumgas

Helium(0)

HELIUMIONS

Helium(4He)

Chebi:33681

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Chemical Properties

mp :

-272.2 °C(lit.)
bp :

-268.934 °C(lit.)
merck :

13,4645
density :

0.1785（0℃）
vapourDensity :

0.14 (vs air)