Gallium

Gallium is a chemical element, having the chemical symbol Ga.

Gallium 69.723(1)   Ga 31 [Ar] 4s2 3d10 4p1 [ ? ] Post-Transition Metal:

Its atomic number (the number of protons) is 31. It has a Standard Atomic Weight of 69.723(1), and is typically found as a solid in its elemental form.

Gallium is considered to be a member of the "Post-Transition Metal" class of elements, has a boiling point of 2,204 °C , and a melting point of 29.76 °C .