Chemistry 5070 · O Level · Ion and ionic bonds

Ion and ionic bonds — practice question

The ions $\text{Ca}^{2+}$ and $\text{PO}_4^{3-}$ join together to make an ionic compound. What formula does the compound have?

  • A$\text{Ca}_2\text{PO}_4$
  • B$\text{Ca(PO}_4)_3$
  • C$\text{Ca}_2(\text{PO}_4)_3$
  • D$\text{Ca}_3(\text{PO}_4)_2$

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