Divalent Cation Definition in Chemistry

A divalent cation is an cation with valence of 2. This type of ion may form two chemical bonds with anions. Also Known As: bivalent cation Examples A magnesium ion, Mg2 is a divalent cation. In fact, all of the alkaline earth metals (group 2) form divalent cations. Source Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.