Polyatomic Ions

• Hydroxide: a compound of a metal with the hydroxide ion OH⁻ (as in many alkalis) or the group —OH.
• Sulfate: an acidic salt containing sulfur trioxide, SO₃
• Carbonate: a salt formed by reaction between carbon dioxide and a base; it contains CO₃²⁻ as its anion.
• Nitrate: a salt that contains nitrogen and oxygen atoms bonded together to form NO₃⁻
• Nitrate: a salt that contains NO₃⁻ as its anion.
• Chloride: a salt that contains Cl⁻ as its anion.
• Chlorite: a salt that contains ClO₂⁻ as its anion.
• Chlorite: a chlorine-containing polyatomic ion with the formula ClO₂⁻
• Bromate: a bromine-containing polyatomic ion with the formula BrO₃⁻
• Iodate: an iodine-containing polyatomic ion with the formula IO₃⁻
• Phosphate: a polyatomic ion consisting of phosphorus and four oxygens, PO₄³⁻
• Hydrogen Carbonate: a weakly basic salt containing HCO₃⁻ as its anion.
• Ammonium ion (NH₄⁺): NH₄+