The example of this force is HCl as a polar molecule. Polar molecules are sometimes described as "permanent dipoles" or "dipoles". Each molecule has two "poles" permanently. One end (pole) of the molecule has a partial positive charge while the other end has a partial negative charge. The molecules will orientate themselves so that the opposite charges attract effectively.In the example on the left, hydrogen chloride is a polar molecule with the partial positive charge on the hydrogen and the partial negative charge on the chlorine. A network of partial + and - charges attract molecules one of another.
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