The radius of the nucleus of an atom whose mass number is $125$ is:

In the nuclear reaction: $X(n, \alpha) {_3Li^7}$,the term $X$ will be

Mark the correct statement.

The ratio of the volume of an $Al^{27}$ nucleus to its surface area is (Given,$R_0 = 1.2 \times 10^{-15} \ m$):

What is the ratio of the radii of the nuclei $_{13}^{27}Al$ and $_{52}^{125}Te$?

Two deuterons are moving towards each other with the same speed. If the distance of closest approach is $2 \, fm$,what should be their initial kinetic energy in $MeV$?