Physics - Modern Physics Question with Solution | TestHub

Key Idea In a nuclear reaction conservation of charge number and mass number must hold good. Alpha particles are positively charged particles with charge $+2e$ and mass $4\mathrm{m}$. Emission of an $\alpha$-particle reduces the mass of the radionuclide by 4 and its atomic number by 2. $\beta$-particles are negatively charged particles with rest mass as well as charge same as that of electrons. $\gamma$-particles carry no charge and mass. Radioactive transition will be as follows $$\begin{array}{rl}& {}_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}⟶{}_{\mathrm{Z}+1}{}^{\mathrm{A}}\mathrm{Y}+{\beta }_{-1}^0\\ & {}_{\mathrm{Z}+1}^{\mathrm{A}}\mathrm{Y}⟶{}_{\mathrm{Z}-1}^{\mathrm{A}-4}\beta +{\alpha }_2^4\\ & {}_{\mathrm{Z}+1}^{\mathrm{A}-4}\beta ⟶{}_{\mathrm{Z}-1}^{\mathrm{A}-4}\beta +{\gamma }_0^0\\ & \end{array}$$