1H1.008

Hydrogène

Reactive nonmetalsBlock sPeriod 1Group 1gas at 20 °C

Configuration :1s¹

Atomic mass :1.008 u

English :Hydrogen

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Modèle de Bohr · pédagogique

Electron configuration

Full1s¹

Short1s¹

Valence electrons1

KLMNOPQ shells

K1

Electronegativity

Pauling2.2

Allen2.3

Mulliken (eV)—

Atomic radii

Empirical25 pm

Calculated53 pm

Covalent31 pm

Van der Waals120 pm

Successive ionisation energies

I₁1312 kJ/mol

Electron affinity72.8 kJ/mol

Oxidation states

-1+1

Bold states = most common.