\ce{^{210}_{83}Bi}\ce{^{212}_{83}Bi}\ce{^{210}_{84}Po}\ce{^{212}_{84}Po}\ce{^{218}_{84}Po}\ce{^{228}_{88}Ra}\ce{^{228}_{90}Th}\ce{^{210}_{82}Pb} \(\ce{^{212}_{82...\ce{^{210}_{83}Bi}\ce{^{212}_{83}Bi}\ce{^{210}_{84}Po}\ce{^{212}_{84}Po}\ce{^{218}_{84}Po}\ce{^{228}_{88}Ra}\ce{^{228}_{90}Th}\ce{^{210}_{82}Pb}\ce{^{212}_{82}Pb}\ce{^{233}_{90}Th}\ce{^{234}_{90}Th}\ce{^{233}_{92}U}\ce{^{234}_{92}U}\ce{^{235}_{92}U}\ce{^{239}_{92}U}\ce{^{239}_{94}Pu} 1 y = years, d = days, h = hours, m = minutes, s = seconds 3 y = years, d = days, h = hours, m = minutes, s = seconds