JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Which of the following conclusions could not be derived from Rutherford’s

\alpha

- particle scattering experiment

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Correct option: C

Electrons move in a circular path of fixed energy called orbits

Option C (Electrons move in a circular path of fixed energy called orbits) is correct because Rutherford's experiment established the nuclear model but did not propose the concept of electrons moving in fixed energy orbits, which was introduced by Bohr.

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n^{\text {th }}

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in magnesium atom is The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass no. A is given by

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.

. The atomic radius of atom is 1 Å. If the mass no. is 64, the fraction of the atomic volume that is occupied by nucleus is: