Question

mention the postulate of Bohr's theory what are the failure of the thomsan atomic model​

Answer 1

bohr theory

electron sare revolving in discrete orbit

electrons are revolving in those orbot whose angular momentum is perfectly multiple of nh/2pie

during revolving in discreate orbit electron does not radiate energy

when electron got energy from outer source they go on the higher energy level here it take 10^-8 sec and it vice versa

thomson failure

thonson did not explain about the spectrum of atom

when electron are distributed on positive dphere due to opposite charge they come to each other and diffuse itself therefore he did not explain about the stability of atom

he did not explain about the stabilty of nucleous

Answer 2

Hii

$\huge\red{heya!!}$

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POSTULATES OF BOHR'S MODEL

1. An atom has a number of stable orbits in which an electron can reside without the emission of radiant energy. Each orbit corresponds, to a certain energy level.

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2. 2. An electron may jump spontaneously from one orbit (energy level E1) to the other orbit (energy level E2) (E2 > E1); then the energy change AE in the electron jump is given by Planck’s equation

∆E = E2-E1 = hv

Where h = Planck’s constant.

And v = frequency of light emitted.

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3. Angular momentum is equal to the integral of nh/2π

mvr = nh/2π

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4. A special surface around nucleus which contained orbits of equal energy and radius was called shell. These shells are numbered from inside to outwards as 1, 2, 3, 4 etc. and called K, L, M, N etc., respectively.

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LIMITATIONS OF THOMSON'S MODEL

1. Thomson's atomic model failed to explain how the positive charge holds on the electrons inside the atom.

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2. It also failed to explain an atom's stability

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3. The theory did not mention anything about the nucleus of an atom.

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