Question

List any three postulates of Bohr's atomic model.

Answer 1

Answer:

Each orbit or shell has a fixed energy and these circular orbits are known as orbital shells. The energy levels are represented by an integer (n=1, 2, 3…) known as the quantum number. ... shells and when an electron attains the lowest energy level, it is said to be in the ground state.

Answer 2

Explanation:

) 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,

ν

=

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

2

π

,