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Chemistry, 01.12.2019 23:31 ddmoorehouseov75lc

Arock formed with 1,000 atoms of a radioactive parent element, but only contains 12.5% of its original radioactive parent atoms today. if the half-life is 1,000,000 years, how old is the rock? (ess 4.6)

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Arock formed with 1,000 atoms of a radioactive parent element, but only contains 12.5% of its origin...

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