Hydrogen

Reactive Nonmetal

Hydrogen (H) is element 1, a reactive nonmetal, in period 1 and group 1 of the periodic table. Its standard atomic weight is 1.008, it melts at -259.16 °C and boils at -252.87 °C. Discovered by Henry Cavendish, 1766.

Atomic Number1

SymbolH

NameHydrogen

Atomic Weight1.008 u

CategoryReactive Nonmetal

Period1

Group1

Melting Point-259.16 °C

Boiling Point-252.87 °C

Density0.00008988 g/cm³

Electron Config1s1

Discovered ByHenry Cavendish, 1766

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