Ga
Gallium
Gallium is a chemical element with the symbol Ga and atomic number 31. It has a standard atomic weight of 69.723, sits in period 4 and group 13, and is classified as a post-transition metal.
Properties
| Symbol | Ga |
|---|---|
| Atomic number | 31 |
| Standard atomic weight | 69.723 |
| Category | Post-transition metal |
| Group | 13 |
| Period | 4 |
| Electron configuration | [Ar] 3d10 4s2 4p1 |
| Outer-shell electrons | 3 |
The figure of 69.723 is a standard atomic weight.
Calculate with gallium
- Molar mass of any formula containing it
- Electron configuration, including ions
- Effective nuclear charge by Slater's rules
- Average atomic mass from isotope abundances
Group 13
Atomic weights are the IUPAC 2021 standard values, abridged to the conventional five significant figures. Group, period, category and electron configuration are derived from the atomic number rather than stored, so they cannot drift out of step with it.