Cerium

Cerium is a chemical element with the symbol Ce and atomic number 58, belonging to the lanthanide series of rare earth metals. It is relatively abundant in Earth's crust and is primarily used in creating catalysts for automotive exhaust systems, improving fuel efficiency and reducing emissions. Cerium is also employed in glass polishing, in electronics, and in some specialized alloys. It typically exists in various oxidation states, most commonly Ce(III) and Ce(IV), which contribute to its versatility in chemical reactions. Its properties make it valuable in industrial applications, especially those related to environmental and technological advancements.