a molecule is polar if we find electronegativity differences between two differing atoms.
when there is large difference between electronegativity values, the more polar the molecule is.
when the electrons are shared equally between the nuclei.then the molecule is non polar
in Cl2 moleculethere is no no polar bonds because the electron charge is same on both atoms.
It is therefore a nonpolar molecule.
bonds in hydrocarbon molecules, as hexane, C6H14, are polar,
