Physics - Modern Physics Question with Solution | TestHub

Let us assume, a particle $X$ having atomic number $Z$ and mass number $A$. When an a-particle is emitted by a nucleus, then its atomic number decreases by 2 and mass number decreases by 4 . So, for given case, $\mathrm{Z}{\mathrm{X}}^{\mathrm{A}}\stackrel{4\text{ a-particle }}{⟶}{\mathrm{Z}}_{-\mathrm{a}}{\mathrm{Y}}^{\mathrm{A}-16}$ When a $\beta$-particle is emitted by a nucleus its atomic number increases by one and mass number remains unchanged. So, for given case, $\mathrm{Z}-8{\mathrm{Y}}^{\mathrm{A}-16}\stackrel{7\beta -particle}{⟶}\mathrm{Z}-1{\mathrm{Z}}^{\mathrm{A}-16}$