Question

The radii of two nuclei with mass numbers $8$ and $64$ is

• A. $1:1$
• B. $1:2$
• C. $2:1$
• D. $2:2$

Answer 1

The correct option is B $1:2$

Taking ratio :

$\frac{R_1}{R_2}=\frac{R_0}{R_0}\frac{(8{)}^{\frac{1}{3}}}{(64{)}^{\frac{1}{3}}}$
$\frac{R_1}{R_2}=\frac{2}{4}=\frac{1}{2}$