Polyatomic ions are ions that contain more than one atom. Some of the most common polyatomic ions that bond with other to form an ionic bond include:

* Sulfate ion (SO4^2-)

* Nitrate ion (NO3^-)

* Carbonate ion (CO3^2-)

* Phosphate ion (PO4^3-)

* Hydroxide ion (OH^-)

* Ammonium ion (NH4^+)

These ions can bond with other ions to form a variety of different ionic compounds. For example, sulfate ion can bond with calcium ion (Ca^2+) to form calcium sulfate (CaSO4), nitrate ion can bond with potassium ion (K^+) to form potassium nitrate (KNO3), and carbonate ion can bond with sodium ion (Na^+) to form sodium carbonate (Na2CO3).