- Atomic Radius (Å)
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).
31
Atomic Number
69.72 u
Atomic Mass
302.91 K
Melting Point
2477 K
Boiling Point
5.91 g/cm³
Density
1.8 Å
Atomic Radius
1.22 Å
Covalent Radius
1.81
Electronegativity
6 eV
First Ionization Energy
41
Electron Affinity
4
Number of Shells
3
Electron Valency
2, 8, 18, 3
Electron Shell Occupations
0.37 J/g
Specific Heat