Size of the Nucleus

The nuclear radius of a certain nucleus is $7.2\mathrm{fm}$ and it has charge of $1.28\times {10}^{-17}\mathrm{C}$ . The number of neutrons inside the nucleus is 

The mass density of a nucleus varies with mass number $A$ as

The nucleus is approximately spherical in shape. Then the surface area of the nucleus having mass number $A$ varies as:

If the nuclear radius of ${}^{27}Al$ is $3.6 \mathrm{fermi}$, the approximate nuclear radius of ${}^{64}Cu$ is:

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

On increasing the mass number which of the nuclear properties is not changed:

The mass number of Helium and Sulphur are $4$ and $32$, respectively. The radius of nucleus of Sulphur is how many times greater than the radius of Helium nucleus?

The volume occupied by an atom is greater than the volume of the nucleus by a factor of about,

Radius of ${}_2{}^4\mathrm{He}$ nucleus is $3$ Fermi. The radius of ${}_{82}{}^{206}\mathrm{Pb}$ nucleus will be

For uranium nucleus how does its mass vary with volume ?