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October 1, 2014

Homework Help: Chemistry

Posted by Matthew on Tuesday, December 11, 2012 at 11:06pm.

All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99 decays to 100.0 g of technetium-99 in 639,000 y, what is its half life

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