Polyatomic Ions

• PO43-

  Phosphate
• NH4+

  ammonium
• H3O+

  hydronium
• O22-

  peroxide
• OH-

  hydroxide
• CH3CO2-

  acetate
• CN-

  cyanide
• N3-

  azide
• CO32-

  Carbonate
• HCO3-

  hydrogen carbonate (bicarbonate)
• NO3-

  nitrate
• NO2-

  Nitrite
• SO42-

  sulfate
• HSO4-

  hydrogen sulfate
• SO32-

  sulfite
• HSO3-

  hydrogen sulfite
• PO43-

  phosphate
• HPO4-

  hydrogen phosphate
• H2PO4

  dihydrogen phosphate
• ClO4-

  perchlorate
• ClO3-

  chlorate
• ClO2-

  chlorite
• ClO-

  hypochlorite
• CrO42-

  chromate
• Cr2O72-

  dichromate
• MnO4-

  permanganate
• CH4

  methane
• C2O42-

  oxalate
• NH3

  ammonia
• SCN-

  thiocyanate
• Hg22+

  mercury(I)