$_6^{12}C$ absorbs an energetic neutron and emits a beta particle. The resulting nucleus is

An atomic nucleus $_{90}^{232}Th$ emits several $\alpha$ and $\beta$ radiations and finally reduces to $_{82}^{208}Pb$. It must have emitted:

$37$ Rutherford equals

Explain the $\alpha$-decay process and give its appropriate example.

Which of the following physical quantities is measured using the unit $rad$?

In the following nuclear reaction,$D \xrightarrow{\alpha} D_{1} \xrightarrow{\beta^-} D_{2} \xrightarrow{\alpha} D_{3} \xrightarrow{\gamma} D_{4}$. The mass number of $D$ is $182$ and the atomic number is $74$. The mass number and atomic number of $D_{4}$ respectively will be: