The fuel used in an atomic pile is

If the mass defect of a nuclide is $3.32 \times 10^{-26} \ g$,its binding energy in $MeV$ is:

Which among the following minerals contains a radioactive element?

Consider an $\alpha$-particle just in contact with a $_{92}U^{238}$ nucleus. Calculate the coulombic repulsion energy (i.e.,the height of the coulombic barrier between $U^{238}$ and $\alpha$-particle) assuming that the distance between them is equal to the sum of their radii.

In the Thorium series,$_{90}Th^{232}$ loses a total of $6$ $\alpha$-particles and $4$ $\beta$-particles in ten stages. The final isotope produced in the series is

$_{95}Am^{241}$ and $_{90}Th^{234}$ belong respectively to