The first radioactive element discovered by Polish physicist Marie Curie was radium-226. It has a halflife of
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The first radioactive element discovered by Polish physicist Marie Curie was radium-226. It has a halflife of 1700 years. Suppose you obtained a microgram of pure 226Ra. How long would you have to wait before the number of decays per second from this sample fell to 104?
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Radium226 has a molar mass of 226 gmol so a microgram of 226 Ra is 442 10 9 ...View the full answer
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