Question

explain the bohrs postulates

Answer 1

The important postulates in his theory are, Electrons revolve round the nucleus with definite velocities in concentric circular orbits situated at definite distances from the nucleus. The energy of an electron in a certain orbit remains constant. ... Bohrproposed that the angular momentum of an electron is quantized

Answer 2

Bohr's Postulates

• An electron in an atom can revolve only in certain stable orbits with fixed energy. These orbits are called Energy Level or Stationary (Constant Energy) states. These were named as K,L,M,N... Energy Levels.

• While revolving in a particular Energy Level, an e do not radiate any radiations.(Classical electromagnetism & classical mechanics cannot be applied on atomic levels in all aspects).

• The energy stats are defined as : electrons can revolve only in those orbits for which the orbital Angular Momentum is integral multiple (Bohr Quantisation Condition) h of 2n.

• From Rutherford's Model : An electron moves in a circle,so it needs centripetal force. This centripetal force is provided by the electrostatic force between e and nucleus.