|Atomic mass||69.72 amu|
Gallium was discovered in 1875.
It has the largest liquid temperature range of any element. It melts a few degrees less than body temperature but does not boil until 2403°C. It is one of the few that expands as it freezes, as do nonmetals and most gases. Its high boiling point makes it ideal for measuring temperatures that would vaporize a thermometer.
Most of the gallium produced are used in the electronics industry. Alloyed with phosphorus, antimony, or arsenic, gallium is fabricated into a wide range of semiconductor devices. The use of Gallium-arsenide GaAs semiconductors improves the efficiency of computer chips. Devices which incorporate the use of GaAs semiconductors include:
- solar panels
- smaller and more powerful lasers