Names and Formulas of Polyatomic Ions and Prefixes

A set of 40 vocabulary flashcards covering common polyatomic cations, polyatomic anions, and numerical prefixes used for hydrates and binary molecular compounds.

Ammonium

$\text{NH}_4^+$.

Hydronium

$\text{H}_3\text{O}^+$.

Mercury(I)

$\text{Hg}_2^{2+}$.

Cyanide

$\text{CN}^-$ .

Thiocyanate

$\text{SCN}^-$.

Nitrite

$\text{NO}_2^-$.

Nitrate

$\text{NO}_3^-$.

Hypochlorite

$\text{ClO}^-$ or $\text{OCl}^-$.

Chlorite

$\text{ClO}_2^-$.

Chlorate

$\text{ClO}_3^-$.

Perchlorate

$\text{ClO}_4^-$.

Acetate

$\text{C}_2\text{H}_3\text{O}_2^-$.

Oxalate

$\text{C}_2\text{O}_4^{2-}$.

Chromate

$\text{CrO}_4^{2-}$.

Dichromate

$\text{Cr}_2\text{O}_7^{2-}$.

Azide

$\text{N}_3^-$.

Carbonate

$\text{CO}_3^{2-}$.

Hydrogen carbonate

$\text{HCO}_3^-$; also known as bicarbonate.

Sulfite

$\text{SO}_3^{2-}$.

Sulfate

$\text{SO}_4^{2-}$.

Hydrogen sulfite

$\text{HSO}_3^-$; also known as bisulfite.

Hydrogen sulfate

$$\text{HSO}_4^-$$

Thiosulfate

$\text{S}_2\text{O}_3^{2-}$.

Hydroxide

$\text{OH}^-$.

Permanganate

$\text{MnO}_4^-$.

Phosphate

$\text{PO}_4^{3-}$.

Monohydrogen phosphate

$\text{HPO}_4^{2-}$.

Dihydrogen phosphate

$\text{H}_2\text{PO}_4^-$.

Peroxide

$\text{O}_2^{2-}$.

di-

The numerical prefix representing 2 for hydrates and binary molecular compounds.

tri-

The numerical prefix representing 3 for hydrates and binary molecular compounds.

tetra-

The numerical prefix representing 4 for hydrates and binary molecular compounds.

penta-

The numerical prefix representing 5 for hydrates and binary molecular compounds.

hexa-

The numerical prefix representing 6 for hydrates and binary molecular compounds.

hepta-

The numerical prefix representing 7 for hydrates and binary molecular compounds.

octa-

The numerical prefix representing 8 for hydrates and binary molecular compounds.

nona-

The numerical prefix representing 9 for hydrates and binary molecular compounds.

Deca

The numerical prefix representing 10 for hydrates and binary molecular compounds.

mono

The numerical prefix representing 1 for hydrates and binary molecular compounds.