The range of the nuclear force is

The radius of the nucleus of silver (atomic number $Z = 47$) is $3.4 \times 10^{-14} \ m$. Calculate the electric potential on the surface of the nucleus. (Given: $e = 1.6 \times 10^{-19} \ C$,$\frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \ N \ m^2/C^2$)

If the mass number of an atom is $A = 40$ and its electron configuration is $1s^2, 2s^2, 2p^6, 3s^2, 3p^6$,the number of neutrons and protons in its nucleus will be

If $S$ is the surface area of a nucleus of mass number $A$, then

The nuclear reaction is represented by $X(n, \alpha) \to _3^7Li$. Which element is $X$?

Write the relation of the size of the nucleus to the atomic size.