Physics - Modern Physics Question with Solution | TestHub

Let the radioactive substance be ${}_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}$ Radioactive transition is given by $${}_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\stackrel{-\alpha }{⟶}{}_{\mathrm{Z}-2}^{\mathrm{A}-4}\mathrm{X}\stackrel{-2\beta }{⟶}{}_{\mathrm{A}-4}\mathrm{X}$$ The atoms of element having same atomic number but different mass numbers are called isotopes. So, ${}_Z^{A}X$ and ${}_Z^{A-4}X$ are isotopes.