Common Polyatomic Ions

Vocabulary flashcards covering common polyatomic cations and anions, their chemical formulas, and classifications by periodic table group.

Ammonium

$$NH_4^+$$

Hydronium

$$H_3O^+$$

Cyanide

$$CN^-$$

Acetate

$$CH_3CO_2^-$$

Carbonate

$$CO_3^{2-}$$

Hydrogen carbonate (bicarbonate)

$$HCO_3^-$$

Nitrite

$$NO_2^-$$

Nitrate

$$NO_3^-$$

Phosphate

$$PO_4^{3-}$$

Hydrogen phosphate

$$HPO_4^{2-}$$

Dihydrogen phosphate

$$H_2PO_4^-$$

Hydroxide

$$OH^-$$

Sulfite

$$SO_3^{2-}$$

Sulfate

$$SO_4^{2-}$$

Hydrogen sulfate (bisulfate)

$$HSO_4^-$$

Hypochlorite

$$ClO^-$$

Chlorite

$$ClO_2^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$