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November 20, 2014

November 20, 2014

Posted by **Marium** on Thursday, January 6, 2011 at 11:13am.

So basically, after 30 seconds it will be 50.After 60 sec. 25 and after 90 sec. it will be 12.5...?

am I right?

Q2) Suppose you analyzed a sample of isotope A. It contained 25 radioactive isotope A atoms, and 103 stable daughter atoms. Approximately how old is the sample?

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