31 Ga 69.7231

Gallium

POST-TRANSITION METAL

Phase: Solid

Discovered: Lecoq de Boisbaudran

Block: P

Summary

Gallium is a chemical element with symbol Ga and atomic number 31. Elemental gallium does not occur in free form in nature, but as the gallium(III) compounds that are in trace amounts in zinc ores and in bauxite. Gallium is a soft, silvery metal, and elemental gallium is a brittle solid at low temperatures, and melts at 29.76 °C (85.57 °F) (slightly above room temperature).

Appearance: silver-white

Source: Wikipedia

Physical Properties

Atomic Mass 69.7231 u

Density 5.91 g/cm³

Melting Point 302.9146 K

Boiling Point 2673 K

Molar Heat 25.86 J/(mol·K)

Electron Affinity 41 kJ/mol

Ionization Energies

1^st: 578.8 kJ/mol

2^nd: 1979.3 kJ/mol

3^rd: 2963 kJ/mol

4^th: 6180 kJ/mol