The ion WO4^2- is known as the tungstate ion, which contains one tungsten atom surrounded by four oxygen atoms. It carries a negative charge of two, indicating that it has gained two extra electrons. Tungstate is commonly found in various minerals and is used in applications such as catalysts and in the production of certain types of glass. Tungstate ions can form complexes with metals, making them important in various chemical processes. They are also utilized in the field of materials science for their unique properties, including their ability to absorb and emit light, which is valuable in optical applications.