hydrogen
PronunciationEdit
- IPA (key): /ˈhaɪdrədʒən/
Audio (US) (file) - Hyphenation: hy‧dro‧gen
NounEdit
Hydrogen's place on the periodic table
- (uncountable) Hydrogen is the lightest chemical element (symbol H) with an atomic number of 1.
- Hydrogen gas is highly flammable.