Gallium

Gallium is a soft silvery metal and is a brittle solid at low temperature. It will melt into liquid when room temperature exceeds 29.8 °C(85.57 °F).

Gallium does not dissolve in water, soluble in acid, alkali, react with sulfur, selenium, tellurium, phosphorus, arsenic and antimony at high temperature.

Gallium is a metalloid element, with the element symbol Ga, belonging to the VIA group in the periodic table, atomic number 31, atomic mass 69.723.