Question

The half-life of I-131 is 8.00 days. If a medical treatment involves a dose of 400. mg of I-131, how much of the isotope remains after 48 days?

3.125 mg


6.25 mg


12.5 mg


25 mg

Answer 1

This is done the same way as the Ba-122 problem above.

Answer 2

6.25

Thank you.