The first artificial disintegration of an atomic nucleus was achieved by

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

When $_3Li^7$ are bombarded with protons,$\gamma$-rays are produced. The nuclide formed is

$A$ closed vessel with rigid walls contains $1 \ mol$ of ${ }_{92}^{238} U$ and $1 \ mol$ of air at $298 \ K$. Considering the complete decay of ${ }_{92}^{238} U$ to ${ }_{82}^{206} Pb$, the ratio of the final pressure to the initial pressure of the system at $298 \ K$ is:

Which of the following can be used to convert $_7^{14}N$ into $_8^{17}O$?

$_{98}Cf^{246}$ was formed along with a neutron when an unknown radioactive substance was bombarded with $_{6}C^{12}$. The unknown substance was: