The value of the average density of a nucleus is $\qquad$ times that of water.

The nucleus of an atom with an atomic mass of $24$ and atomic number $11$ consists of:

If the nucleus ${}_{13}^{27}Al$ has a nuclear radius of about $3.6 \, fm$,then ${}_{52}^{125}Te$ would have its radius approximately as .......$fm$.

The radius $R$ of a nucleus of mass number $A$ can be estimated by the formula $R = (1.3 \times 10^{-15}) A^{1/3} \; m$. It follows that the mass density of a nucleus is of the order of $(M_{\text{prot}} \cong M_{\text{neut}} = 1.67 \times 10^{-27} \; kg)$.

The atomic masses of two isotopes of an element are $34.98 \ u$ and $36.98 \ u$ and their relative abundances are $75.4 \%$ and $24.6 \%$ respectively. The average atomic mass of the element is: (in $u$)

An atom ${}_3^8 X$ is bombarded by a shower of fundamental particles. In $10 \ s$, this atom absorbs $10$ electrons, $10$ protons, and $9$ neutrons. The percentage growth in the surface area of the nucleus is recorded as: (in $\%$)