a) przemiany α dla izotopów 

${}_{90}^{232}\text{T}\text{h}\to {}_{88}^{228}\text{R}\text{a}+{}_2^4\alpha$      

${}_{88}^{226}\text{R}\text{a}\to {}_{86}^{222}\text{R}\text{n}+{}_2^4\alpha$    

${}_{84}^{210}\text{P}\text{o}\to {}_{82}^{206}\text{P}\text{b}+{}_2^4\alpha$    

 

b) przemiany β dla izotopów: 

${}_{87}^{223}\text{F}\text{r}\to {}_{88}^{223}\text{R}\text{a}+{}_{\text{-}1}^0\beta$    

${}_{84}^{218}\text{P}\text{o}\to {}_{85}^{218}\text{A}\text{t}+{}_{\text{-}1}^0\beta$    

${}_{82}^{212}\text{P}\text{b}\to {}_{83}^{212}\text{B}\text{i}+{}_{\text{-}1}^0\beta$