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Question: 6 if a sample of bone known to be about...

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6. If a sample of bone known to be about 10,740 years old has 400 atoms of C-14, how many atoms were in the sample when the organism died? 7. How old is a bone if it presently contains 0.3125 g of C-14, but it was estimated to have originally contained 80.0 gof C-14? 8. What is the half-life of a radioactive isotope if a 500.0 g sample decays to 62.5 g in 24.3 hours? 9. Why are large nuclei unstable?
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