The neutron was discovered by

For a nucleus of mass number $A$ and radius $R$,the mass density of the nucleus can be represented as:

Two nuclei have their mass numbers in the ratio of $1: 3$. The ratio of their nuclear densities would be

An atom of mass number $15$ and atomic number $7$ captures an $\alpha$-particle and then emits a proton. The mass number and atomic number of the resulting product will respectively be

The ratio of the relative strengths of strong and weak nuclear forces is

What is the nucleus of an atom?