CBSE Class 12 · 2020 · Modern PhysicsMultiple Choice

Which of the following statements is not correct according to the Rutherford model?

(A)Most of the space inside an atom is empty.
(B)The electrons revolve around the nucleus under the influence of coulomb force acting on them.
(C)Most part of the mass of the atom and its positive charge are concentrated at its centre.
(D)The stability of atom was established by the model.✓ Correct

Answer: (D)

Solution

Rutherford's nuclear model could explain the large-angle scattering of

α

-particles (empty atom, tiny massive positive nucleus, electrons held by Coulomb force) but it could not establish the stability of the atom — an accelerating orbiting electron would radiate energy and spiral into the nucleus.
Hence statement (D) is incorrect.

(D)

CBSE Class 12 Board · 2020 · Single correct option

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