Ga
Gallium
Z 31 69.723 g/molPost-Transition Metal
Nucleus
31 Protons
39 Neutrons
31 Electrons (3 Valence)
Shell distribution: K2 • L8 • M18 • N3 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Ar]3d104s24p1
Oxidation States
CommonRare
0
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Radii
Empirical
130 pm1.3 Å
Calculated
136 pm1.36 Å
Covalent
122±3 pm1.22±0.03 Å
Van der Waals
187 pm1.87 Å
IonicGa3+
62 pm0.62 Å
Crystal Structure
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Orthorhombic
Pearson symbol
oS8
Space group
Cmce No. 64