?Radioactive DecayNatural uranium consists of \({ }^{235} \mathrm{U}\) (percent
Chapter 10, Problem 40(choose chapter or problem)
Radioactive Decay
Natural uranium consists of \({ }^{235} \mathrm{U}\) (percent abundance = 0.7200 %, \(\lambda=3.12 \times 10^{-17} / \mathrm{s}\)) and \({ }^{238} \mathrm{U}\) (percent abundance = 99.27 %, \(\lambda=4.92 \times 10^{-18} / \mathrm{s}\)). What were the values for percent abundance of \({ }^{235} \mathrm{U}\) and \({ }^{238} \mathrm{U}\) when Earth formed \(4.5 \times 10^{9}\) years ago?
Text Transcription:
^235 U
lambda=3.12 times 10^17/s
^238 U
lambda=4.92 times 10^18/s
4.5 times 10^9
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