Common Polyatomic Ions

Vocabulary practice flashcards covering names, chemical formulas, and charges of common polyatomic cations and anions.

Ammonium

A 1+ positive polyatomic ion with the chemical formula $NH_4^{1+}$.

Hydronium

A positive polyatomic ion with the chemical formula $H_3O^+$.

Acetate

A 1- negative polyatomic ion with the chemical formula $C_2H_3O_2^{1-}$.

Chlorate

A 1- negative polyatomic ion with the chemical formula $ClO_3^{1-}$.

Chlorite

A 1- negative polyatomic ion with the chemical formula $ClO_2^{1-}$.

Cyanide

A 1- negative polyatomic ion with the chemical formula $CN^{1-}$.

Dihydrogen Phosphate

A 1- negative polyatomic ion with the chemical formula $H_2PO_4^{1-}$.

Hydrogen Carbonate

A 1- negative polyatomic ion with the chemical formula $HCO_3^{1-}$.

Hydrogen Sulfate

A 1- negative polyatomic ion with the chemical formula $HSO_4^{1-}$.

Hydroxide

A 1- negative polyatomic ion with the chemical formula $OH^{1-}$.

Hypochlorite

A 1- negative polyatomic ion with the chemical formula $ClO^{1-}$.

Nitrate

A 1- negative polyatomic ion with the chemical formula $NO_3^{1-}$.

Nitrite

A 1- negative polyatomic ion with the chemical formula $NO_2^{1-}$.

Perchlorate

A 1- negative polyatomic ion with the chemical formula $ClO_4^{1-}$.

Permanganate

A 1- negative polyatomic ion with the chemical formula $MnO_4^{1-}$.

Thiocyanate

A 1- negative polyatomic ion with the chemical formula $SCN^{1-}$.

Carbonate

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

Chromate

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

Dichromate

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

Hydrogen Phosphate

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

Peroxide

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

Sulfate

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

Sulfite

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

Thiosulfate

A 2- negative polyatomic ion with the chemical formula $S_2O_3^{2-}$.

Phosphate

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