Polyatomic ion

A polyatomic ion is a group of atoms bound together, with a positive or negative electrical charge. See molecule.

• Acetate (CH₃COO^-)
• Ammonium (NH₄⁺)
• Carbonate (CO₃^2-)
• Chlorate (ClO₃^-)
• Chlorite (ClO₂^2-)
• Chromate (CrO₄^2-
• Cyanide (CN^-)
• Dichromate (Cr₂O₇^-)
• Hydronium (H₃O⁺)
• Hydroxide (OH^-)
• Nitrate (NO₃^-)
• Nitrite (NO₂^-)
• Phosphate (PO₄^3-)
• Sulfate (SO₄^2-)
• Sulfite (SO₃^2-