Answer:The formula for aluminum fluoride is AlF₃. Composition: 1. Aluminum (Al): Aluminum is a metal and has an atomic number of 13.It typically forms a +3 oxidation state in compounds.2. Fluoride (F): Fluoride is the anionic form of fluorine and has an atomic number of 9.It typically forms a -1 oxidation state. Formation of AlF₃: In aluminum fluoride, aluminum donates three electrons to form a cation (Al³⁺), while each fluoride atom accepts one electron to form an anion (F⁻).