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January 30, 2015

January 30, 2015

Posted by **Kelli Kenyon** on Monday, June 6, 2011 at 10:00pm.

Approximately how much mass remains after 8.0 hours? After 21 hours, and what is the half life of the isotope

- physics -
**drwls**, Tuesday, June 7, 2011 at 8:12amWhat is the isotope? You are being asked for the half life without being provided with any data on the decay rate.

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