Accessed:

Helium

Molecular formula:	He
Average mass:	4.003
Monoisotopic mass:	4.002603
ChemSpider ID:	22423

Wikipedia

Spectra

Structural identifiers

Names

Names and synonyms

Verified

206GF3GB41

[UNII]

231-168-5

[EINECS]

7440-59-7

[RN]

Helium

[Wiki]

[ACD/IUPAC Name] [ACD/Index Name]

Helium

[German]

[ACD/IUPAC Name] [ACD/Index Name]

Hélium

[French]

[ACD/IUPAC Name]

helium atom

hydridohelium

MFCD00011031

[MDL number]

Unverified

(3He)helium

(4)2He

(4)He

14762-55-1

[RN]

2He

494798-31-1

[RN]

71086-78-7

[RN]

[He]

atomic helium

EINECS 231-168-5

EINECS 238-822-9

EINECS 275-187-7

helio

Helium (usp)

helium(0)

Helium, refrigerated liquid (cryogenic liquid) [UN1963] [Nonflammable gas]

O-Helium

p-Helium

Database IDs