JEE Main Chemistry question

Deflection back of a few particles on hitting a thin foil of gold shows that **[Manipal 2008]**

(A)Nucleus is heavy
(B)Nucleus is small
(C)Both (a) and (b)Correct
(D)Electrons create hindrance in the movement of -particles

Answer: (C)

Solution

The rare back-scattering of -particles occurs only when they happen to approach very close to a nucleus that is both heavy (to repel/deflect them strongly via Coulomb

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Question ID VK-132184