(A) : The positively charged nucleus of an atom has a radius of almost 10^–15m.
(R) : In α−particle scattering experiment, the distance of closest approach for α−particles is $≃$ 10^–15m.

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(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is A.

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Detailed Solution

In α−particle scattering experiment, the minimum distance of closest approach for α−particles is $≃$ 10^–15m.

Hence, Nuclear size is of order of 10^–15m.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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