On the other hand, the atoms (ions) in ionic materials show strong attractions to other ions in their vicinity. This generally leads to low melting points for covalent solids, and high melting points for ionic solids. For example, the molecule carbon tetrachloride is a non-polar covalent molecule, CCl 4. It's melting point is -23°C.
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3. For compounds of a single element like Cl2 or N2, the number of bonds that need to be shared is the number of electrons it needs to become stable. (E.g for N2, it has 5 valence electrons and needs 3 more to become stable, therefore it has 3 pairs of shared electrons.) 4.