Chapter10: Radioactivity And Nuclear Processes
Section: Chapter Questions
Problem 10.51E
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Transcribed Image Text:9b. A rock contains 0.699 mg Pb20°, a stable isotope, for every 1.000 mg U238 (t12 = 4.5 x 10 years) present.
Assuming that no lead was originally present, that all the Pb200 formed over the years remained in the rock, and
that the number of nuclides in intermediate stages of decay between U238 and Pb206 is negligible, calculate the
age of the rock.
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