hydrogen

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Hydrogen

neutronium${\displaystyle \longleftarrow }$ 1 ${\displaystyle \longrightarrow }$helium

• IPA ^(key): /ˈhaɪdrədʒən/

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• Hyphenation: hy‧dro‧gen

1. (uncountable) Hydrogen is the lightest chemical element (symbol H) with an atomic number of 1.

   Hydrogen gas is highly flammable.

• hydrogen bomb
• positronium
• protium
• deuterium
• tritium