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iesWrire two postulates of Bohr model of an atom based on quantun cne |
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Answer» The main and most important postulates of Bohr’s theory : Postulates of Bohr's theory of hydrogen atom 1. NUCLEAR CONCEPT :An atom consists of a small and massive central core, called nucleus around which planetary electrons revolve. The centripetal force required for their rotation is provided by the electrostatic attraction between the electrons and the nucleus. 2. QUANTUM CONDITION :Of all the possible circular orbits allowed by the classical theory, the electrons are permitted to circulate only in those orbits in which the angular momentum of an election is an integral multiple of h/2 pye, h being Planks constant. Therefore, for any permitted orbit, L=mvr =nh/2PYE, n=1,2,3…… WheWhere L, m, and v are the angular momentum, mass and speed of the electron, r is the radius of the permitted orbit and n is positive integer called principal quantum no. The above equation is Bohr’s famous quantum condition. |
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