# Compare the radii of the nuclei of mass numbers 27 and 64.

Q: Compare the radii of the nuclei of mass numbers 27 and 64.

Sol: As $\large R = R_0 (A)^{1/3}$

The ratio of the radii of the nuclei is

$\large \frac{R_1}{R_2} = (\frac{A_1}{A_2})^{1/3}$

$\large \frac{R_1}{R_2} = (\frac{27}{64})^{1/3} = \frac{3}{4}$