Question

write postulates of Bohr model of atom​

Answer 1

Answer:

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. ... While it is revolving around the nucleus in an orbit, an electron neither loses not gains energy.

Answer 2

Explanation:

The postulates of bohr's atomic model are

1) The electrin in the hydrogen atom revolves around the nucleus with definite velocity, in fixed, closed, circular paths, called "orbitals" or "shells".

2) These are designed as 1,2,3,4... or K,L,M,N... from the side of the nucleus.

3) The electron revloves in the orbit whose angular momentum is equal to nh/2π.

It is given by the expression

mvr = nh/2π

where m = mass of electron

v = velocity of electron

r = radius of orbit

h = planck's constant = 6.626 × 10^-34 jouls

n = 1,2,3,4...

Note: Angular momentum = I×W

Since I =mer^2 and

W = v/r where v = linear velocity

Hence Angular momentum = mer^2 × v/r = mevr