Hydrogen

neutronium$⟵$ 1 $⟶$helium

Pronunciation

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Noun

Hydrogen's place on the periodic table

An airship full of hydrogen gas

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

   Hydrogen gas is highly flammable.

Related words

• hydrogen bomb
• positronium
• protium
• deuterium
• tritium