Polyatomic Ions

Vocabulary flashcards covering the names, chemical formulas, and charges of essential polyatomic ions.

Ammonium

A polyatomic cation with the chemical formula $NH_4^+$.

Hydronium

A polyatomic cation with the chemical formula $H_3O^+$.

Mercury(I)

A polyatomic cation with the chemical formula $Hg_2^{2+}$.

Acetate

A polyatomic anion with the chemical formula $CH_3COO^-$ (or $C_2H_3O_2^-$).

Hydroxide

A polyatomic anion with the chemical formula $OH^-$.

Hypochlorite

A polyatomic anion with the chemical formula $ClO^-$.

Chlorite

A polyatomic anion with the chemical formula $ClO_2^-$.

Chlorate

A polyatomic anion with the chemical formula $ClO_3^-$.

Perchlorate

A polyatomic anion with the chemical formula $ClO_4^-$.

Nitrite

A polyatomic anion with the chemical formula $NO_2^-$.

Nitrate

A polyatomic anion with the chemical formula $NO_3^-$.

Permanganate

A polyatomic anion with the chemical formula $MnO_4^-$.

Carbonate

A polyatomic anion with the chemical formula $CO_3^{2-}$.

Hydrogen Carbonate

A polyatomic anion with the chemical formula $HCO_3^-$; also known as bicarbonate.

Cyanide

A polyatomic anion with the chemical formula $CN^-$.

Chromate

A polyatomic anion with the chemical formula $CrO_4^{2-}$.

Dichromate

A polyatomic anion with the chemical formula $Cr_2O_7^{2-}$.

Peroxide

A polyatomic anion with the chemical formula $O_2^{2-}$.

Phosphate

A polyatomic anion with the chemical formula $PO_4^{3-}$.

Phosphite

A polyatomic anion with the chemical formula $PO_3^{3-}$.

Hydrogen Phosphate

A polyatomic anion with the chemical formula $HPO_4^{2-}$.

Dihydrogen phosphate

A polyatomic anion with the chemical formula $H_2PO_4^-$.

Sulfite

A polyatomic anion with the chemical formula $SO_3^{2-}$.

Sulfate

A polyatomic anion with the chemical formula $SO_4^{2-}$.

Hydrogen sulfate

A polyatomic anion with the chemical formula $HSO_4^-$; also known as bisulfate.