February 20, 2017

Homework Help: Chemistry

Posted by Taylor on Sunday, October 28, 2007 at 8:16pm.

The half-life of iodine -125 is 60 days. What fraction of iodine-125 would be left after 180 days?

my teacher didn't teach us this and expects us to know it and I don't understand!!!
could you explain it please!?

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