Gallium (Ga)
Gallium
Gallium (Ga) is a post-transition metal in period 4, group 13. Its relative atomic mass is 69.723 and the molar mass of the atom is 69.723 g/mol.
Atomic number 31
Atomic mass 69.723
Molar mass 69.723 g/mol
Category Post-transition metal Solid
Properties of gallium
| Atomic number | 31 |
|---|---|
| Symbol | Ga |
| Latin name | Gallium |
| Relative atomic mass | 69.723 |
| Molar mass | 69.723 g/mol |
| Group, period, block | 13, 4, p |
| Category | Post-transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Ar] 3d¹⁰ 4s² 4p¹ |
| Electronegativity (Pauling) | 1.81 |
| Atomic radius | 130 pm |
Electron configuration of gallium
Electrons per shell
K2L8M18N3
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹
Noble-gas notation
31 protons · 31 electrons[Ar] 3d¹⁰ 4s² 4p¹
Formula and compounds of gallium
Simple substanceGagalliumMolar mass of Ga: 69.723 g/mol
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Frequently asked questions
The relative atomic mass of gallium is 69.723, so the molar mass of the atom is 69.723 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹. Noble-gas notation: [Ar] 3d¹⁰ 4s² 4p¹.