Question: a bone sample from chernobyl area was analyzed for radioactive...
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A bone sample from Chernobyl area was analyzed for radioactive izotope 90Sr and the concentration as of today was 11.1 ppm. What was the concetration (ppm) of 90Sr in the sample in 1986 when the Chernobyl disaster occurred?
The half-life of 90Sr is 29.6 year.
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