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What are Polyatomic Ions?
Polyatomic ions are molecules with an electric charge due to a difference in the number of their protons and electrons.
List of Commonly-Mentioned Polyatomic Ions:
Ammonium: NH₄⁺
Acetate: C₂H₃O₂⁻
Carbonate: CO₃²⁻
Bicarbonate (or Hydrogen carbonate): HCO₃⁻
Nitrate: NO₃⁻
Nitrite: NO₂⁻
Sulfate: SO₄²⁻
Sulfite: SO₃²⁻
Hydroxide: OH⁻
Phosphate: PO₄³⁻
Phosphite: PO₃³⁻
Chlorate: ClO₃⁻
Chlorite: ClO₂⁻
Hypochlorite: ClO⁻
Perchlorate: ClO₄⁻
Cyanide: CN⁻
Thiocyanate: SCN⁻
Chromate: CrO₄²⁻
Dichromate: Cr₂O₇²⁻
Permanganate: MnO₄⁻
Oxalate: C₂O₄²⁻
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