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

An element consists of a mixture of three isotopes $A$,$B$,and $C$ of masses $m_1$,$m_2$,and $m_3$ respectively. If the relative abundances of the three isotopes $A$,$B$,and $C$ are in the ratio $2:3:5$,the average mass of the element is:

When a $U^{238}$ nucleus,initially at rest,decays by emitting an alpha particle with speed $u$,what will be the recoil velocity of the residual nucleus?

Let the binding energy per nucleon of a nucleus be denoted by $E_{bn}$ and the radius of the nucleus be denoted by $r$. If the mass numbers of nuclei $A$ and $B$ are $64$ and $125$ respectively,then:

Two spherical nuclei have mass numbers $216$ and $64$ with their radii $R_1$ and $R_2$ respectively. The ratio,$\frac{R_1}{R_2}$ is equal to

The graph between $\log R$ and $\log A$,where $R$ is the nuclear radius and $A$ is the mass number,is: