Which particle can be used to change $_{13}Al^{27}$ into $_{15}P^{30}$?

In the transformation of ${}_{92}^{238}U$ to ${}_{92}^{234}U$,if one emission is an $\alpha$-particle,what should be the other emission$(s)$?

Which one of the following nuclear transformations is of the $(n, p)$ type?

On bombarding $_8^{16}O$ with deuterons,the nuclei of the product formed will be

Which one of the following nuclear reactions is correct?

Artificial radioactivity was first discovered by