Question

Answer in short


Compare all the proposed models of an atom given in this chapter.

Class 9 - Science - Structure of the Atom



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Answer 1

J. Thomson: Since discharge tube experiments suggested the presence of negatively charged particles in an atom which is neutral, J. J. Thomson suggested that electrons are embedded in a sphere of positive charge.

E. Rutherford: The gold foil experiments of Rutherford suggested that all the positive charge is located in a very small space which is 10 times the radius of an atom. Therefore, Rutherford gave a model in which electrons are revolving round the nucleus.

Neils Bohr: To explain the stability of an atom and atomic spectra, Bohr suggested that electrons are moving round the nucleus in orbits which have fixed energy shells. There is a loss or gain in energy of electron when it moves from one orbit to the other.

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Answer 2

Answer:

There are total three atomic models each of which tried to explain the atomic structure in a better way. Following table compares the specific characteristics of the models:



Explanation:

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