Question

The postulates of Bohr's atomic model are given below. Arrange them in the correct sequence:
(1) As long as the electron revolves in a particular orbit, the electron does not lose its energy. Therefore, these orbits are called stationary orbits, and the electrons are said to be in stationary energy states.
(2) Electrons revolve around the nucleus in specified circular paths called orbits or shells.
(3) The energy associated with a certain energy level increases with the increase of its distance from the nucleus.
(4) An electron jumps from a lower energy level to a higher energy level by absorbing energy. But when it jumps from a higher to lower energy level, energy is emitted in the form of electromagnetic radiation.
(5) Each orbit or shell is associated with a definite amount of energy. Hence, these are also called energy levels and are designated asK, L, M, and N respectively.

• A. $13452$
• B. $23514$
• C. $25314$
• D. $21435$

Answer 1

The correct option is C

$25314$

The explanation for the correct option: (C)

1. Electrons revolve around the nucleus in selected circular paths called orbits or shells.
2. Each orbit or shell is associated with a definite amount of energy. Hence, these are also called energy levels and are designated as K, L, M, and N, respectively.
3. The energy corresponding with a certain energy level increases with the increase of its distance from the nucleus.
4. As long as the electron revolves in a particular orbit, the electron does not lose its energy. Therefore, these orbits are called stationary orbits, and the electrons are said to be in stationary energy states.
5. An electron jumps from a lower energy level to a higher energy level by absorbing energy. But when it jumps from a higher to lower energy level, energy is emitted in the form of electromagnetic radiation.
6. Hence, the correct sequence is $25314$.

The explanation for the incorrect options:

(A) The correct sequence of the postulates of Bohr's atomic model is not $13452$.

(B) It is not $23514$ which is the correct sequence of the postulates of Bohr's atomic model .

(D) The correct sequence of the postulates of Bohr's atomic model is not $21435$.

Hence, option (C) is correct - The correct sequence of the postulates of Bohr's atomic model is $25314$.