31Ga69.723
Gallium
Post-transition metal · element 31 · group 13, period 4
Quick facts
| Symbol | Ga |
|---|---|
| Atomic number | 31 |
| Relative atomic mass | 69.723 |
| Category | Post-transition metal |
| Position | group 13, period 4 |
| State at 20 °C | Solid |
| Melting point | 29.8 °C |
| Boiling point | 2,229 °C |
| Density | 5.91 g/cm³ |
| Electronegativity | 1.81 |
| Electron configuration | [Ar] 3d10 4s2 4p1 |
About Gallium
Gallium has the symbol Ga and atomic number 31, which means every gallium atom has 31 protons in its nucleus and, in a neutral atom, 31 electrons. At room temperature it is a solid.
Post-transition metals are softer metals found to the right of the transition metals, with lower melting points.
It melts at 29.8 °C and boils at 2,229 °C.
Explore it
See where gallium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.