-238-U decays to -206-Pb with a half-life of 4-47 times 10-9 y- this happens in a number of steps-Can you justify a single half-life this chain of processes - A sample of rock is found to contain 2-00 mg of -238- U and 0-600 mg of -206-Pb assuming that all the lead has come from uranium- that life of the rock -

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Standard XII

Physics

First Order Radioactive Decay

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$$ ^{238}U $$ decays to $$ ^{206}Pb$$ with a half-life of $$ 4.47 \times 10^9 $$y. this happens in a number of steps.Can you justify a single half-life for this chain of processes ? A sample of rock is found to contain 2.00 mg of $$ ^{238} U $$ and 0.600 mg of $$ ^{206}Pb$$ assuming that all the lead has come from uranium, find that life of the rock .

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