$_{13}Al^{28}$ when radiated by a suitable projectile gives $_{15}P^{31}$ and a neutron. The projectile used is:

Which of the following nuclear reactions results in the emission of a neutron?

The nuclear reaction $_{17}Cl^{37} + _1H^2 \to _{18}Ar^{38} + _0n^1$ represents:

$_6C^{14}$ is formed from $_7N^{14}$ in the upper atmosphere by the action of the fundamental particle:

$_{89}Ac^{231}$ gives $_{82}Pb^{207}$ after the emission of some $\alpha$ and $\beta$ particles. The number of such $\alpha$ and $\beta$ particles are respectively:

The number of neutrons emitted when ${}_{92}^{235} U$ undergoes controlled nuclear fission to ${}_{54}^{142} Xe$ and ${}_{38}^{90} Sr$ is