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Question 2: What are Bohr’s postulates about Hydrogen atom? Hence derive expressions for (i) radii of electron orbit (ii) energy of the electron.


Bohr’s postulates about H atom

Neil Bohr proposed a theory of the Hydrogen atom based on the ideas from classical Physics, Plank’s Quantum theory and Einstein Photon theory of light. His model consists of the following postulates.

(1) Electron revolves around the nucleus under the influence of the electrostatic force between the electron and nucleus.

(2) Electron cannot revolve around the nucleus in any arbitrary orbits. Only those orbits are allowed for which the orbital angular momentum is an integral multiple of (h/2π). Therefore,

For n = 1, 2, 3…

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