Ionic Compounds and Polyatomic Ions

Vocabulary flashcards covering empirical formulas, ionic rules, and standard polyatomic ions from lecture notes.

Empirical Formula

The reduced ratio of atoms or ions in a compound where the net charge must equal zero for ionic compounds.

Chromium (IV) oxide

An ionic compound formed from $\text{Cr}^{4+}$ and $\text{O}^{2-}$, yielding the reduced empirical formula $\text{CrO}_2$.

Ammonium

A polyatomic cation with the chemical formula $\text{NH}_4^+$.

Ammonia

A neutral chemical compound with the formula $\text{NH}_3$.

Carbonate

A polyatomic anion with the formula $\text{CO}_3^{2-}$.

Chlorate

A polyatomic anion with the formula $\text{ClO}_3^-$.

Chromate

A polyatomic anion with the formula $\text{CrO}_4^{2-}$.

Nitrite

A polyatomic anion with the formula $\text{NO}_2^-$.

Nitrate

A polyatomic anion with the formula $\text{NO}_3^-$.

Phosphate

A polyatomic anion with the formula $\text{PO}_4^{3-}$.

Acetate

A polyatomic anion with the formula $\text{C}_2\text{H}_3\text{O}_2^-$.

Permanganate

A polyatomic anion with the formula $\text{MnO}_4^-$.

Manganate

A polyatomic anion with the formula $\text{MnO}_4^{2-}$.

Azide

A polyatomic anion with the formula $\text{N}_3^-$.

Mercury (I)

A polyatomic cation represented as $\text{Hg}_2^{2+}$.

Mercury (II)

A monatomic cation represented as $\text{Hg}^{2+}$.

Hydroxide

A polyatomic anion with the formula $\text{OH}^-$.

Cyanide

A polyatomic anion with the formula $\text{CN}^-$.

Silver Ion

A cation represented as $\text{Ag}^+$.

Zinc Ion

A cation represented as $\text{Zn}^{2+}$.