COVALENT MOLECULES

Covalent molecules contain bonds that share electrons. They can be even sharing of electrons, non polar molecules, or uneven sharing of molecules, polar molecules. Covalent molecules contain bonds between nonmetal and nonmetal.

For example: carbon dioxide, methane, sulfur dioxide.


IONIC MOLECULES

Ionic molecules contain bonds that do not share electrons. The electrons are transferred from a metal atom to a nonmetal atom forming ions, cation (positively charged atoms) and anion (negatively charged atoms). Therefore, ionic molecules are involved in complete transfer of electrons. Ionic molecules contain bonds between metal and non metal.

For example: Sodium chloride, Magnesium oxide, Lithium hydroxide.

Tags: polar molecules nonpolar molecules covalent bonds ionice bonds ions