This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the concept of Azimuthal quantum numbers, the explanation of the fine structure obtained from the atomic spectrum, representation of subshells (s,p,d,f) from Azimuthal Quantum numbers. The relationship between principal and Azimuthal Quantum number and method of calculating the electrons in subshells are discussed. 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.