Question

If the mass number of a nucleus is doubled, its radius becomes:

Options

• 2 times

• 2^1/3 times

• 4 times

• Unchanged

Answer 1

2^1/3 times

Explanation:

\[R=R_{0}A^{1/3}.\mathrm{~If~A\to2A,~then~}R^{\prime}=R_{0}(2A)^{1/3}=2^{1/3}\cdot R.\]