Ionic Compounds Containing Polyatomic Ions

Vocabulary flashcards covering common polyatomic cations, diatomic anions, carbon-containing anions, and oxoanions.

Ammonium

A polyatomic cation with the formula $NH_4^+$ (listed as NHA in transcript).

Hydronium

A polyatomic cation with the formula $H_3O^+$ (listed as H₂O+ in transcript).

Mercury(1)

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

Hydroxide

A diatomic anion with the formula $OH^-$.

Cyanide

A diatomic anion with the formula $CN^-$.

Carbonate

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

Acetate

A carbon-containing polyatomic anion with the formula $CH_3CO_2^-$.

Oxalate

A carbon-containing polyatomic anion with the formula $C_2O_4^{2-}$.

Sulfite

An oxoanion with the formula $SO_3^{2-}$.

Sulfate

An oxoanion with the formula $SO_4^{2-}$.

Nitrite

An oxoanion with the formula $NO_2^-$.

Nitrate

An oxoanion with the formula $NO_3^-$.

Phosphate

An oxoanion with the formula $PO_4^{3-}$.

Permanganate

An oxoanion with the formula $MnO_4^-$.

Chromate

An oxoanion with the formula $CrO_4^{2-}$.

Dichromate

An oxoanion with the formula $Cr_2O_7^{2-}$.

Hypochlorite

An oxoanion with the formula $ClO^-$.

Chlorite

An oxoanion with the formula $ClO_2^-$.

Chlorate

An oxoanion with the formula $ClO_3^-$.

Perchlorate

An oxoanion with the formula $ClO_4^-$.

Cations

Positively charged polyatomic ions, including ammonium, hydronium, and mercury(1).

Diatomic anions

Polyatomic anions consisting of two atoms, such as hydroxide ($OH^-$) and cyanide ($CN^-$).

Oxoanions

Polyatomic anions containing oxygen, such as sulfite, sulfate, nitrite, nitrate, phosphate, permanganate, chromate, dichromate, hypochlorite, chlorite, chlorate, and perchlorate.