Final answer:
Three examples of metal ions combining with polyatomic ions are calcium carbonate (CaCO3), magnesium sulfate (MgSO4), and aluminum phosphate (AlPO4).
Step-by-step explanation:
Here are three examples of metal ions combining with different polyatomic ions:
- Ca^2+ ion combines with the CO3^2- ion to form calcium carbonate (CaCO3)
- Mg^2+ ion combines with the SO4^2- ion to form magnesium sulfate (MgSO4)
- Al^3+ ion combines with the PO4^3- ion to form aluminum phosphate (AlPO4)
Each example includes a different metal ion and a different polyatomic ion, with varying ionic charges.