The postulates of Bohr's atomic model are given below. Arrange them in the correct sequence :
(1) As long 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 round the nucleus in specified circualr 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 form 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 sheel 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.

Options

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

Explanation

(i) Electrons revolve around the nucleus in specified circular paths called orbits or shells.
(ii) 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.
(iii) The energy associated with a certain energy level increases with the increase of its distance from the nucleus.
(iv) As long as the electron revolves in a particular orbit , the electrons does not lose its energy. Therefore, these orbits are called stationary orbits and the electrons are said to be in stationary energy states.
(v) 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.