In a molecule, polarity is created in the event of a difference of the electronegativity (tendency that an element to attract a shared pair of electrons to its own) among the different atoms in the molecule. This is when it is possible to say the net dipole of the molecules. The molecule that is involved is referred to as the molecule that is polar.

If there isn’t any difference in electronegativity between molecules’ atoms, then the molecule in question is known as a nonpolar one or that the dipole moment net of the molecule is not zero.