* CO₂ (Carbon Dioxide): This molecule is covalent. Carbon and oxygen share electrons to form double bonds.
* CO₃⁻² (Carbonate Ion): This ion is ionic. The carbon atom forms covalent bonds with the oxygen atoms, but the overall structure has a negative charge due to the sharing of electrons. This makes it an ion, which can then form ionic bonds with positively charged ions (cations) to create ionic compounds.
Key Points to Remember:
* Covalent Bonds: Occur when atoms share electrons to achieve a stable electron configuration. These bonds are generally found between nonmetals.
* Ionic Bonds: Occur when one atom completely transfers electrons to another atom, creating ions with opposite charges that attract each other. These bonds are usually between a metal and a nonmetal.
Let me know if you have any other chemistry questions!
