Chemistry, 28.05.2020 20:04 macymichtavy
How long would it take a 20 g sample of Thorium-234 to decay into only 5 grams of Thorium-234? please help me):
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How long would it take a 20 g sample of Thorium-234 to decay into only 5 grams of Thorium-234? pleas...
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