AP Chemistry Poly Atomic Ion List

A complete list of polyatomic ions and their corresponding chemical formulas and charges based on the provided AP Chemistry reference materials.

Ammonium

$$NH_4^+$$

Acetate

$$C_2H_3O_2^-$$

Hydroxide

$$OH^-$$

Cyanide

$$CN^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$

Chlorite

$$ClO_2^-$$

Hypochlorite

$$ClO^-$$

Nitrate

$$NO_3^-$$

Nitrite

$$NO_2^-$$

Permanganate

$$MnO_4^-$$

Carbonate

$$CO_3^{2-}$$

Bicarbonate (Hydrogen Carbonate)

$$HCO_3^-$$

Sulfate

$$SO_4^{2-}$$

Hydrogen Sulfate

$$HSO_4^-$$

Sulfite

$$SO_3^{2-}$$

Hydrogen Sulfite

$$HSO_3^-$$

Chromate

$$CrO_4^{2-}$$

Dichromate

$$Cr_2O_7^{2-}$$

Phosphate

$$PO_4^{3-}$$

Hydrogen Phosphate

$$HPO_4^{2-}$$

Dihydrogen Phosphate

$$H_2PO_4^-$$