Polyatomic Ions to Know

Vocabulary flashcards covering common polyatomic cations, anions, their chemical formulas, and rules regarding ionic charges.

Ammonium

$$NH_4^+$$

Hydronium

$$H_3O^+$$

Cyanide

$$CN^-$$

Hydroxide

$$OH^-$$

Peroxide

$$O_2^{2-}$$

Hypochlorite

$$ClO^-$$

Chlorite

$$ClO_2^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$

Nitrite

$$NO_2^-$$

Nitrate

$$NO_3^-$$

Carbonate

$$CO_3^{2-}$$

Hydrogen carbonate or bicarbonate

$$HCO_3^-$$

Phosphite

$$PO_3^{3-}$$

Phosphate

$$PO_4^{3-}$$

Hydrogen phosphate

$$HPO_4^{2-}$$

Dihydrogen phosphate

$$H_2PO_4^-$$

Sulfite

$$SO_3^{2-}$$

Sulfate

$$SO_4^{2-}$$

Hydrogen sulfate or bisulfate

$$HSO_4^-$$

Acetate(Long Form)

$$CH_3COO^-$$

Permanganate

$$MnO_4^-$$

Chromate

$$CrO_4^{2-}$$

Dichromate

$$Cr_2O_7^{2-}$$

Acetate(Short Form)

$$C_2H_3O_2^-$$