Artificial radioactivity was first discovered by

$_6C^{12}$ and $_1T^3$ are formed in nature due to the nuclear reaction of a neutron with:

Identify $X$ in $_{16}S^{32} + X \to _{15}P^{30} + _{2}He^{4}$.

An element ${ }_{x} A^{y}$ emits $5$ $\alpha$ and $4$ $\beta$ particles to give ${ }_{82} B^{207}$. The number of protons and neutrons in $A$ are respectively

Which of the following particles is emitted in the reaction $_{13}Al^{27} + _{2}He^{4} \to _{15}P^{30} + .....$?

In the nuclear reaction $_4^9Be(p, \alpha)X$,the $X$ is