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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The density of the copper ( ₂₉⁶⁴ Cu ) nucleus is greater than that of the carbon ( ₆¹² C ) nucleus. Reason (R): The nucleus of mass number A has a radius proportional to A ^ 1 / 3 . In the light of the above statements, choose the most appropriate answer from the options given below :

Options

  1. A( A ) is correct but ( R ) is not correct
  2. B( A ) is not correct but ( R ) is correct
  3. CBoth ( A ) and ( R ) are correct and ( R ) is the correct explanation of (A)
  4. DBoth (A) and (R) are correct but (R) is not the correct explanation of (A)

Correct answer

B. ( A ) is not correct but ( R ) is correct

Step-by-step solution

= M ~V = m _ n A 4 3 R ^3 = m _ n A 4 3 AR ₀^3 So is almost is constant aligned & R = R ₀ ~A ^ 1 / 3 & R ~A ^ 1 / 3 aligned

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