$F_{pp}$, $F_{nn}$, and $F_{np}$ are the nuclear forces between proton-proton, neutron-neutron, and neutron-proton respectively. Then the relation between them is:

The particles which can be added to the nucleus of an atom without changing its chemical properties are called:

Which stable nucleus has a radius that is half that of $Fe^{56}$?

Assume that protons and neutrons have equal masses. The mass of a nucleon is $1.6 \times 10^{-27} \ kg$ and the radius of a nucleus is $R = 1.5 \times 10^{-15} A^{1/3} \ m$. The approximate ratio of the nuclear density to the water density is $n \times 10^{13}$. The value of $n$ is $.................$

In the atomic scale,the weakest force in nature is

Two protons exert a nuclear force on each other. The distance between them is approximately: