Some radioactive decay series


Some radioactive decay series

Table
Some radioactive decay series
element radioactive isotope final product isotopic abundance (%) half-life (in 109 years)
uranium U-235 Pb-207     0.72   0.7
U-238 Pb-206   99.28   4.5
thorium Th-232 Pb-208 100.0 14.0
potassium K-40 (89%) Ca-40     0.01   1.4*
(11%) Argon-40 11.9*
rubidium Rb-87 Sr-87   27.8 48.8
*half-life for K-40 as a whole is 1.25(109) years.
See as table:

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Universalium. 2010.

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