Polyatomic Ions

• Hydroxide

  OH -
• Nitrate:

  NO3 -
• Sulfate:

  SO4 2-
• Carbonate:

  CO3 2-
• Ammonium:

  NH4 +
• Phosphate:

  PO4 3-
• Ethanate:

  CH3COO -
• Chromate:

  CrO4 2-
• Which one is the polyatomic ion?

  sulfate or sulfide :

  sulfate
• Does ammonium act as a metal or non-metal?

  metal