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Radioactive isotopes are sometimes used to determine the age of rocks or fossils. Carbon-14 is an isotope
which decays into Nitrogen-14 with a half life of 500 years. If a fossil were found with 5 grams of Carbon-14,
how much Carbon-14 was there 1 half life ago?
2.5 grams
O grams
10 grams
5 grams
Answers: 2
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Radioactive isotopes are sometimes used to determine the age of rocks or fossils. Carbon...
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