compare the radii of two nuclei having mass number 3 and 81 respectively

Dear Student

We know that

R = RO A 13therefore,R1 = RO A1 13and R2 = RO A2 13So,R1R2 = A1A213=> R1R2 = 38113=> R1R2 = 12713=> R1R2 = 13=> R1 = 13 R2

Regards

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