* Ionic Bonding: Calcium carbonate is primarily an ionic compound. It forms through electrostatic attraction between positively charged calcium ions (Ca²⁺) and negatively charged carbonate ions (CO₃²⁻).
* Covalent Bonds within the Carbonate Ion: While the carbonate ion itself contains covalent bonds between carbon and oxygen, these bonds are polar due to the electronegativity difference between the atoms. However, the carbonate ion as a whole carries a negative charge.
Key Points:
* Ionic vs. Covalent: Ionic compounds are formed by the transfer of electrons between atoms, while covalent compounds are formed by the sharing of electrons.
* Polarity: Polarity in molecules arises from uneven sharing of electrons due to electronegativity differences.
* Calcium Carbonate: The strong electrostatic attraction between the calcium and carbonate ions overrides the polar nature of the bonds within the carbonate ion.
Therefore, calcium carbonate is classified as an ionic compound.
