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The ratio of the nuclear radius, of an atom with mass number A and 2 4 He  is 14 1 3 . What is the value of A ?

Correct answer

56

Step-by-step solution

From the relation r ∝ A 1 / 3 , we have, r 2 r 1 = A 2 A 1 1 / 3 or A 2 4 1 / 3 = 1 4 1 / 3 Therefore, A 2 = 56

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