Polyatomic & Common Ions Practice Set

Vocabulary practice flashcards for common polyatomic ions, including ammonium and 21 anions with their chemical formulas and charges.

Ammonium

A 1+ cation with the formula $NH_4^+$

Acetate

A 1- anion with the formula $CH_3COO^-$ or $C_2H_3O_2^ -$

Bromate

A 1- anion with the formula $BrO_3^-$

Hypochlorite

A 1- anion with the formula $ClO^-$

Chlorite

A 1- anion with the formula $ClO_2^-$

Chlorate

A 1- anion with the formula $ClO_3^-$

Perchlorate

A 1- anion with the formula $ClO_4^-$

Cyanide

A 1- anion with the formula $CN^-$

Dihydrogen phosphate

A 1- anion with the formula $H_2PO_4^-$

Hydrogen carbonate (bicarbonate)

A 1- anion with the formula $HCO_3^-$

Hydrogen sulfate (bisulfate)

A 1- anion with the formula $HSO_4^-$

Hydroxide

A 1- anion with the formula $OH^-$

Nitrite

A 1- anion with the formula $NO_2^-$

Nitrate

A 1- anion with the formula $NO_3^-$

Iodate

A 1- anion with the formula $IO_3^-$

Periodate

A 1- anion with the formula $IO_4^-$

Permanganate

A 1- anion with the formula $MnO_4^-$

Carbonate

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

Chromate

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

Dichromate

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

Hydrogen phosphate

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

Oxalate

A 2- anion with the formula $C_2O_4^{2-}$

Peroxide

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

Sulfite

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

Sulfate

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

Thiosulfate

A 2- anion with the formula $S_2O_3^{2-}$

Phosphite

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

Phosphate

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

Arsenate

A 3- anion with the formula $AsO_4^{3-}$

Hydronium

$$H_3^{}O_{}^{+}$$