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Geography, 04.04.2020 02:00 richard376
An igneous rock that originally had 8000 atoms of a certain radioactive material when it was formed is found to now have only 250 atoms of that material left. If the half-life of the radioactive material is 2 million years, how old is the igneous rock
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An igneous rock that originally had 8000 atoms of a certain radioactive material when it was formed...
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