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What are the postulates of Bohr's atomic model?

1 Answer
Jun 6, 2017

The Bohr's postulates -

1) An electron can revolve around the nucleus in certain fixed orbits of definite energy without emission of any radiant energy. Such orbits are called stationary orbits.

2) An electron can make a transition from a stationary state of higher energy #E_2# to a state of lower energy #E_1# and in doing so, it emits a single photon of frequency,

#nu = (E_2 - E_1)/h# where #h# is the Planck's constant.

Conversely, on absorbing an energy, #E_2 - E_1# when the electron is at energy #E_1#, the electron can make a transition from #E_1# to #E_2#.

3) Only those orbits are allowed for which the angular momentum of the electron is an integral multiple of #h/(2pi)#,

Thus, #L = (nh)/(2pi)# where #n = 0,1,2,.....#