Chemistry - Radioactivity Question with Solution | TestHub

(P) $\alpha$-emission, ${}_Z^{A}X\to {}_{Z-2}^{A-4}Y+{}_2^4\mathrm{He},X$ and $Y$ are isodiapher.

(Q) Emission of one $\alpha$ and $2\beta$-particles, ${}_Z^{A}X\to {}_Z^{A-4}Y+{}_2^4\mathrm{He}+2_{-1}^0\beta ,X$ and $Y$ are isotopes.

(R) Emission of $\gamma$-rays, ${}_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\to {}_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}+{}_0^0\gamma$, X is nuclear isomer.

(S) Positron-emission, ${}_Z^A\mathrm{X}{\to }_{Z-1}^{\mathrm{A}}\mathrm{Y}{+}_{+1}^0\beta$, $\mathrm{X}$ and Y are isobar.