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Asked Nov 18, 2019

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An igneous rock contains a radioactive Isotope that has a half life of 10 million years. Careful analysis shows that only one quarter of the original concentration of the parent isotope is left. How old is the igneous rock ?

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Half life means the time taken by the sample to reach its half the mass of parent . in this case the half life is 10 milion years to become one half of the parent. this half again radiates and will take again 10 mili...

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