1/2

• Polyatomic Ion of Sulphate?


  $SO_4 ^{2-}$
• Polyatomic Ion of Phosphate?


  $PO_4\space^{3-}$
• Polyatomic Ion of Nitrate?


  $NO_3\space^{-}$
• Polyatomic Ion of Carbonate?


  $CO_3\space^{2-}$
• Polyatomic Ion of Hydrogen Carbonate?


  $HCO_3\space^{-}$