Gallium is fairly reactive. It combines with most non-metals at high temperatures, and it reacts with both acids and alkalis. Gallium metal is stable in dry air. It slowly oxidizes in moist air until a protective film forms. With oxygen, it forms the white oxide, Ga2O3. This oxide can be changed into to the metal when heated at high temperatures in hydrogen, and with Gallium metal at 700 °C. Gallium does not dissolve in cold nitric acid because a protective film of gallium oxide forms. Gallium does not react with water at temperatures up to 100 °C. It does, however, react with hydrochloric acid and other mineral acids. When dissolved in other acids, it forms Gallium salts (Gallate). Gallium is amphoteric and when reacting with sodium and potassium