The first controlled artificial disintegration of an atomic nucleus was achieved by

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

Bombardment of aluminum by $\alpha$-particle leads to its artificial disintegration in two ways,$(i)$ and $(ii)$ as shown. Products $X,$ $Y$ and $Z$ respectively are,

Artificial radioactivity was first discovered by

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

Artificial elements have been prepared by bombardment reactions in high energy accelerators. What is the mass number of the element $X$ produced in the following nuclear reaction: $_{95}^{249}Cf + _{7}^{15}N \rightarrow _{105}X + 4_{0}^{1}n$?