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.