FSc Chemistry Book1, CH 5, LEC 20: Principal Quantum number

This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the principal Quantum Number normally denoted by n which tells us the energy levels, the number of shells and the energy and radius of an electron revolving in the atom. 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.