give two postulates of Bohr's model
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Bor model is in the atom.It is situated in the middle of a atom.
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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,
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