Question

what are the postulates of bhor's atomic model

Answer 1

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Your Answer.....

Postulate of Bohr's atomic model :

1. Eectron revolving definite circular orbit around the nucleus and these orbit are designated by the letter K, L, M, N and by the number 1, 2, 3, 4 and so on.
2. As long as electrons revolve in a particular Orbit they can neither gain energy nor lose energy. Such Orbit are called as stationary Orbit .
3. When an electron jumps from a higher orbit to lower Orbit it release energy in the form of raldiations and when an electron jumps from lower Orbit to a higher Orbit it is absorbs energy in the form of raldiations.
4. The angular momentum of aln electron is an integral multiple of h/2π mvr = nh/2π.

Answer 2

Answer:

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−E1/h 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,....