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What is the age of a sample if the ratio of radioactive parent to stable daughter product is 1:1 and the half life is 5 million years?
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What is the age of a sample if the ratio of radioactive parent to stable daughter product is 1:1 and the half life is 5 million years?

User CpnCrunch
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If the ratio of parent to daughter product is 1:1, that means that half the parent has decayed into daughter product. Since the half-life is 5 million years, then the sample is 5 million years old
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User Tomalec
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