(Chemical symbol: Ga). A rare metallic element belonging to the aluminum group. It is used in low-melting alloys, and also in semiconductor technology.

Like mercury, gallium can be a liquid at room temperature. Atomic number, 31; atomic weight 69.72; melting point, 30.1 “C (86.2″F); specific gravity, 5.94 at 22°C (72°F).