Question

What are different postulate of bohr's model of the atom?

Answer 1

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

E2

to a state of lower energy

E1

and in doing so, it emits a single photon of frequency,

ν=E2−E1h

where

h

is the Planck's constant.

Conversely, on absorbing an energy,

E2−E1

when the electron is at energy

E1

, the electron can make a transition from

E1 to E2 .

3) Only those orbits are allowed for which the angular momentum of the electron is an integral multiple of h2π

,

Thus, L=nh2π

where

n=0,1,2

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Answer 2

The different postulates of Bohr's Model are :

• Only certain special orbits known as discrete orbits of electrons, are allowed inside the atom.

• While revolving in discrete orbits, the electrons do not radiate energy.

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