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Uranium-238 Undergoes a Series Of α\alpha And β\beta - Decays, Which End at Lead-206

Question 133

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Uranium-238 undergoes a series of α\alpha and β\beta - decays, which end at lead-206.Overall, the half-life is 4.5 billion years.How old is a uranium ore that has a 206Pb to 238U ratio of A) 0.80, B) 1.0, and C) 1.2?

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A) 3.8 * 109

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