Recognised as Chemical formula
H2
- Dihydrogen
- Formula
- 2.016 g/mol
- 2 atoms
H2 is dihydrogen. It has a molar mass of 2.016 g/mol, made up of 2 atoms across 1 element: 2 × H.
Molar mass
Molar mass2.016 g/mol
Total atoms per molecule2
Distinct elements1
Mass of one molecule3.3476468 × 10^-24 g
Molecules per gram2.987173 × 10^23
Name
NameDihydrogen
Also calledhydrogen gas
SourceNerdulator compound names, September 2026. Systematic names follow the IUPAC Red Book (2005) and Blue Book (2013)
Composition by mass
H100%
Hydrogen (H × 2)2.016 g/mol, 100%
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