Common Polyatomic Ions

Polyatomic Ions $-1$ Charge

• Hydroxide: $\text{OH}^-$
• Acetate: $\text{C}<em>2\text{H}</em>3\text{O}_2^-$
• Nitrite: $\text{NO}_2^-$
• Nitrate: $\text{NO}_3^-$

Polyatomic Ions $-2$ Charge

• Carbonate: $\text{CO}_3^{2-}$
• Sulfite: $\text{SO}_3^{2-}$
• Sulfate: $\text{SO}_4^{2-}$

Polyatomic Ion $-3$ Charge

• Phosphate: $\text{PO}_4^{3-}$