Question

Mention the merits of bohr model of atomic structure

Answer 1

1) Bohr's atomic model explained the stability of an atom. According to Bohr, an electron revolving in a particular orbit cannot lose energy. Therefore, emission of radiation is not possible as long as the electron remains in one of its energy levels and hence there is no cause of insatbility in his model.


2) Bohr's concept of atom explained successfully the atomic spectra of hydrogen atom. From the Bohr's atomic model, it is clear that electron can have only certain definite energy levels. When the electron is present as close to the nucleus as possible, the atom has the minimum possible energy and is said to be in the ground state. When energy from some outside source is supplied to it, it can absorb a definite amount of energy and jumps to higher energy state. Such state of an atom possesses more energy than possessed in the ground state is called the excited state.


3) Bohr's theory could predict the values of energies which an electron can have while revolving around the nucleus of hydrogen in hydrogen atom.

Answer 2

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Merits of Bohr's Atomic Model?

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1. The experimental value of radii and energies in hydrogen atom are in good agreement with that calculated on the basis of Bohr's theory.
2. Bohr's concept of stationary state of electrons explains the emission and absorption spectra of hydrogen like atom.
3. The experimental values of the spectral lines of hydrogen spectrum are in close agreement calculated by Bohr's theory.

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