How long would you have to wait before its activity
One gram of radium 226, which has a half life of 1,600 years, has an activity of 1.0 Cu. How long would you have to wait before its activity decreased to 0.25 Cu?
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one gram of radium 226 which has a half life of 1600 years has an activity of 10 cu how long would you have to wait
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