Fizika - 2011. jesen, 20.

${}_{82}^{212}\mathrm{P}\mathrm{b}\{\; \}\_\{82\}^\{212\}\; \backslash mathrm\{~Pb\}$

${}_{84}^{213}\mathrm{P}\mathrm{o}\{\; \}\_\{84\}^\{213\}\; \backslash mathrm\{Po\}$

${}_{82}^{213}\mathrm{P}\mathrm{b}\{\; \}\_\{82\}^\{213\}\; \backslash mathrm\{~Pb\}$

${}_{84}^{214}\mathrm{P}\mathrm{o}\{\; \}\_\{84\}^\{214\}\; \backslash mathrm\{Po\}$