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Hydrogen (H) — Element 1

A concise reference for Hydrogen, element 1.

Element overview

Hydrogen (H) is element 1 with a listed atomic mass of 1.008 u. It is in group 1 and period 1. Its category is nonmetal.

Atomic properties

Electron configuration: 1s1. Electronegativity: 2.2. Common oxidation states: -1, +1.

Physical properties

Density: 0.00008988; melting point: 14.01; boiling point: 20.28. Values depend on conditions, phase and source.

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