This video lecture from Chemical Bonding (F.Sc. First Year Chemistry) covers the limitations of the Lewis concept about how simply it tell us the sharing of the electrons between two atoms but fails to tell us about the geometry of the molecules, bond polarities and energies associated with it. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.