Polyatomic Ions

A complete set of vocabulary flashcards for common polyatomic cations and anions, including their names, formulas, and charges.

Ammonium

$$NH_4^+$$

Mercury(I)

$$Hg_2^{2+}$$

Hydroxide

$$OH^-$$

Hydrogen sulfate

$$HSO_4^-$$

Acetate

$$CH_3COO^-$$

Hypochlorite

$$ClO^-$$

Chlorite

$$ClO_2^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$

Nitrite

$$NO_2^-$$

Nitrate

$$NO_3^-$$

Permanganate

$$MnO_4^-$$

Dihydrogen phosphate

$$H_2PO_4^-$$

Cyanide

$$CN^-$$

Hydrogen carbonate (bicarbonate)

$$HCO_3^-$$

Sulfite

$$SO_3^{2-}$$

Sulfate

$$SO_4^{2-}$$

Thiosulfate

$$S_2O_3^{2-}$$

Dichromate

$$Cr_2O_7^{2-}$$

Carbonate

$$CO_3^{2-}$$

Monohydrogen phosphate

$$HPO_4^{2-}$$

Oxalate

$$C_2O_4^{2-}$$

Chromate

$$CrO_4^{2-}$$

Phosphate

$$PO_4^{3-}$$