Common Polyatomic Ions

Vocabulary flashcards mapping names of polyatomic ions to their chemical formulas.

Mercury(I) (or mercurous)

$$Hg_2^{2+}$$

Ammonium

$$NH_4^+$$

Cyanide

$$CN^-$$

Carbonate

$$CO_3^{2-}$$

Hydrogen carbonate (or bicarbonate)

$$HCO_3^-$$

Acetate

$$C_2H_3O_2^-$$

Oxalate

$$C_2O_4^{2-}$$

Hypochlorite

$$ClO^-$$

Chlorite

$$ClO_2^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$

Chromate

$$CrO_4^{2-}$$

Dichromate

$$Cr_2O_7^{2-}$$

Permanganate

$$MnO_4^-$$

Nitrite

$$NO_2^-$$

Nitrate

$$NO_3^-$$

Hydroxide

$$OH^-$$

Peroxide

$$O_2^{2-}$$

Phosphate

$$PO_4^{3-}$$

Monohydrogen phosphate

$$HPO_4^{2-}$$

Dihydrogen phosphate

$$H_2PO_4^-$$

Sulfite

$$SO_3^{2-}$$

Sulfate

$$SO_4^{2-}$$

Hydrogen sulfite (or bisulfite)

$$HSO_3^-$$

Hydrogen sulfate (or bisulfate)

$$HSO_4^-$$

Thiosulfate

$$S_2O_3^{2-}$$