Polyatomic ion

A polyatomic ion is an ion (chemical compound with an electrical charge) that is made of multiple atoms. A polyatomic ion can be either a cation (positive charge) or anion (negative charge).

Many minerals contain polyatomic anions. Polyatomic cations are rarer, and are usually made by people.

+ Some polyatomic ionsCationsAnionsCharge  Formula  Name  Charge  Formula  Name +1    Hydronium -1    Hydroxide +1    Ammonium -1    Nitrate +2    Mercury polycations -1    Acetate +2    Vanadyl ion -2    Sulfate -2    Carbonate -3    Citrate -3    Phosphate