Question: Q. 8. Choose the correct alternative from the clues given at the end of each statement :
(a) The size of the atom in Thomson’s modet 1 the atomic size in Rutherford’s model, (much greater than/no different from/much less than)
(b) In the ground state of electrons are in stable equilibrium, while in …… electrons always experience a net force. (Thomson’s model/Rutherford’s model)
(c) A classical atom based on is doomed to collapse. (Thomson’s model/Rutherford’s model)
(d) An atom has a nearly continuous mass distribution in ………… but has a highly nonuniform mass distribution in (Thomson’s model/Rutherford’s model)
(e) The positively charged part of the atom possesses most of the mass in (Rutherford’s model/both the models)
[NCERT Exemplar]
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Solution:
Ans. (a) The sizes of the atoms taken in Thomson’s model is not different from the atomic size in Rutherford’s model.
(b) In the ground state of Thomson’s model, the electrons are in stable equilibrium, while in Rutherford’s model electrons always experience anet force.
(c) A classical atom based on Rutherford’s model is doomed to collapse.
(d) An atom has a nearly continuous mass distribution in Thomson’s model, but has a highly non-uniform mass distribution in Rutherford’s model.
(e) The positively charged part of the atom possesses most of the mass in both the models.
Very Short Answer Type Questions
(1 mark each)
