Question

Postulates of bohr model

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Answer 1

THE MAIN POSTULATES OF BOHR'S ATOMIC THEORY ARE:
1. The electrons revolving around the nucleus are confined to certain fixed orbits called shells or energy levels ,each of which is associated with a fixed amount of energy.
2. While it is revolving around the nucleus in an orbit, an electron neither loses not gains energy.
3. An electron revolving in a particular orbit, in gaining a certain amount of energy, jumps to the next orbit and vice versa. Since each orbit is associated with a fixed amount of energy, Bohr called it an energy level.

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Answer 2

Answer:

in order to overcome the objections raised against rutherfords model of the atom niels bohr put forward the following postulates about the model of an atom:

Explanation:

(i) only certain special orbits known as discrete orbits of electrons are allowed inside the atom

(ii) while revolving in discrete orbits the electrons do not radiate energy

(iii) these orbits or shells are called energy levels energy levels in an atom

(iv) these orbits or shells are represented by the letters k ,l ,m ,n are the numbers n= 1,2,3,4