This video lecture from Chemical Bonding (F.Sc. First Year Chemistry) covers the concept of ion formation and the associated energy profiles, factors which influence the Ionization energy, the trends of the ionization energy in the groups and periods of the Periodic table. 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.