31Ga
Gallium
Post-Transition MetalGallium (Ga) is element 31, a post-transition metal, in period 4 and group 13 of the periodic table. Its standard atomic weight is 69.723, it melts at 29.76 °C and boils at 2204 °C. Discovered by Lecoq de Boisbaudran, 1875.
Atomic Number31
SymbolGa
NameGallium
Atomic Weight69.723 u
CategoryPost-Transition Metal
Period4
Group13
Melting Point29.76 °C
Boiling Point2204 °C
Density5.907 g/cm³
Electron Config[Ar] 3d10 4s2 4p1
Discovered ByLecoq de Boisbaudran, 1875