Polyatomic Ions

As the final post in this section, we're going to go over the common polyatomic ions. Polyatomic ions are just ions composed of multiple atoms that are likely to stay together. Whenever you see any of these ions, you can be treat them as a single atom.

Charge of 1

Ammonium Ion (`NH_4^+`)

Acetate Ion (`CH_3COO^-` or `C_2H_3O_2^-`)

Bicarbonate Ion (`HCO_3^-`)

Cyanide Ion (`CN^-`)

Nitrate Ion (`NO_3^-`)

Nitrite Ion (`NO_2^-`)

Perchlorate Ion (`ClO_4^-`)

Permanganate Ion (`MnO_4^-)

Charge of 2

Carbonate Ion (`CO_3^(2-)`)

Chromate Ion (`CrO_4^(2-)`)

Dichromate Ion (`Cr_2O_7^(2-)`)

Sulfate Ion (`SO_4^(2-)`)

Sulfite Ion (`SO_4^(2-)`)

Charge of 3

Phosphate Ion (`PO_4^(3-)`)