An oxide /ˈɒksaɪd/ is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. Metal oxides typically contain an anion of oxygen in the oxidation state of −2. Most of the Earth’s crust consists of solid oxides, the result of elements being oxidized by the oxygen in air or in water. Hydrocarbon combustion affords the two principal carbon oxides: carbon monoxide and carbon dioxide. Even materials considered pure elements often develop an oxide coating. For example, aluminium foil develops a thin skin of Al2O3 (called a passivation layer) that protects the foil from further corrosion.
Cerium Oxide Erbium Oxide Lanthanum Oxide Yttrium Oxide Lutetium Oxide Samarium Oxide Scandium Oxide Terbium Oxide Thulium Oxide Ytterbium Oxide Europium Oxide Holmium Oxide Neodymium Oxide Praseodymium Neodymium Oxide Praseodymium Oxide Zirconium Dioxide