This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the doublet line structure obtained out of the emission spectrum of Alkali metals and its difference with the fine structure obtained in Bohr’s atomic model. The working of Goudsmit and Uhlenbeck about the spin of the electron is also added. All the quantum numbers are also summarized in the end of the video. Find more e-learning material and educational video lectures in Urdu at maktab.pk.