In the nuclear reaction ${}_{92}\mathrm{U}^{234}\to {}_{90}\mathrm{Th}^{230}+\mathrm{X}+\mathrm{Q};$ 

$\mathrm{X}$ is

In the nuclear reaction ${}_2\mathrm{He}^4+{}_7\mathrm{He}^{14}\to \mathrm{X}+{}_1\mathrm{H}^1$;

X is

In what sequence the radioactive radiations are emitted in the following nuclear reaction

${}_{\mathrm{Z}}\mathrm{X}^{\mathrm{A}}\to {}_{\mathrm{Z}+1}\mathrm{Y}^{\mathrm{A}}\to {}_{\mathrm{Z}-1}\mathrm{K}^{\mathrm{A}-4}\to {}_{\mathrm{Z}-1}\mathrm{K}^{\mathrm{A}-4}$