First proposed to exist by Dmitri Mendeleyev in 1871. Gallium was discovered by the French chemist Paul Émile Lecoq de Boisbaudran in France in 1875.
Name: Gallium Symbol: Ga Atomic number: 31 Atomic weight: 69.723 State: solid Group, period, block: 13, 4, p Color: silver-white Classification: post-transition metal Electron configuration: 4s2 3d10 4p1
Density: 5.91 g/cm-3 Melting point: 302.9146 K, 29.7646 °C, 85.5763 °F Boiling point: 2477 K, 2204 °C, 3999 °F
Oxidation states: 3, 2, 1 Electronegativity: 1.81 (Pauling scale) Ionization energies: 1st: 578.8 kJ·mol-1 Covalent radius: 122±3 pm Van der Waals radius: 187 pm
There are two naturally occurring isotopes of gallium exist, 69Ga, and 71Ga.