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Radium Occurs Only in Uranium Ores,typically with an Observed Ra/U

Question 66

Multiple Choice

Radium occurs only in uranium ores,typically with an observed Ra/U ratio of 1mg/3kg.Uranium ores normally contain only about 200 ppm of U.How many kilograms of uranium ore must be processed to obtain 1 mg of radium?


A) 1700 kg ore
B) 15,000 kg ore
C) 6.0 × 108 kg ore
D) None of these

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