Common Polyatomic Ions

Vocabulary flashcards covering the names and formulas of common polyatomic cations and anions from Table 2.4.

Hydronium ion

$$H_3O^+$$

Ammonium ion

$$NH_4^+$$

Cyanide ion

$$CN^-$$

Acetate ion

$$CH_3CO_2^-$$

Carbonate ion

$$CO_3^{2-}$$

Hydrogen carbonate ion (bicarbonate ion)

$$HCO_3^-$$

Oxalate ion

$$C_2O_4^{2-}$$

Nitrite ion

$$NO_2^-$$

Nitrate ion

$$NO_3^-$$

Phosphate ion

$$PO_4^{3-}$$

Hydrogen phosphate ion

$$HPO_4^{2-}$$

Dihydrogen phosphate ion

$$H_2PO_4^-$$

Hydroxide ion

$$OH^-$$

Sulfite ion

$$SO_3^{2-}$$

Sulfate ion

$$SO_4^{2-}$$

Hydrogen sulfate ion (bisulfate ion)

$$HSO_4^-$$

Hypochlorite ion

$$ClO^-$$

Chlorite ion

$$ClO_2^-$$

Chlorate ion

$$ClO_3^-$$

Perchlorate ion

$$ClO_4^-$$

Chromate ion

$$CrO_4^{2-}$$

Dichromate ion

$$Cr_2O_7^{2-}$$

Permanganate ion

$$MnO_4^-$$