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# Non-polar molecules

Molecules that have an equal distribution of charge are non-polar.

Molecules without fluorine, oxygen, nitrogen, or chlorine are usually non-polar.

Liquid alkanes such as pentane ($\ce{C5H12}$) are non-polar.

Some molecules containing the electronegative elements $(\ce{F},\ce{O},\ce{Cl},\ce{N})$ can be non-polar. This happens when the molecules are structurally balanced and the charge is evenly distributed.

Carbon dioxide ($\ce{CO2}$) is a non-polar molecule but each $\ce{C=O}$ bond is not. The bonds are placed such that the charge on both ends are approximately the same.

The image below shows some non-polar molecules.

From left to right, molecular structures of propane, methane, carbon dioxide and borotrifluoride are shown.