Gallium is a chemical element wi seembol Ga an atomic nummer 31. Elemental gallium daes nae occur in free furm in naitur, but as the gallium(III) compoonds that are in trace amoonts in zinc ores an in bauxite. Gallium is a saft sillery metal, an elemental gallium is a brittle solid at law temperaturs. If it is held in the human haund long enough, gallium will melt, syne it melts at the temperatur o about 29.76 °C (85.57 °F) (slichtly above ruim temperatur). The meltin pynt o gallium is uised as a temperatur reference pynt. The alloy galinstan (68.5% gallium, 21.5% indium, an 10% tin) haes the even lawer meltin pynt o −19 °C (−2 °F), well ablo the freezin pynt o watter. Beginnin wi its discovery in 1875 through the era o semiconductors, gallium wis uised primarily as an agent tae mak alloys that melt at law temperaturs. Then, gallium acame uiseful in semiconductors, includin as a dopant.