Question

The radius of nucleus is:

• A. proportional to its mass number
• B. inversely proportional to its mass number
• C. proportional to the cube root of its mass number
• D. not related to its mass number

Answer 1

The correct option is C proportional to the cube root of its mass number

The radius of a nucleus (r) is proportional to the cube root of its mass number (A).

The approximate law is $r=r_0\times A^{1/3}$

where $r_0=1.2\times {10}^{-15}m$

option C is correct