31 Ga
Post-transition metal
Gallium
Melts in your hand at 30°C.
Properties of Gallium
- Atomic number (Z)
- 31
- Symbol
- Ga
- Atomic mass
- 69.723 g/mol
- Category
- Post-transition metal
- Group
- 13
- Period
- 4
- Electron configuration
- [Ar] 3d¹⁰ 4s² 4p¹
- Electronegativity (Pauling)
- 1.81
- Atomic radius
- 136 pm
- First ionization energy
- 579 kJ/mol
- Melting point
- 302.91 K (29.8 °C)
- Boiling point
- 2477 K (2203.8 °C)
- Density
- 5.907 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1875