Iodine-123, which is used for diagnostic imaging contained by the thyroid, have a half-life of 13 hours. If 50.0 mg of?

I-123 were prepared at 8:00 A.M. on Monday, how oodles mg remain at 10:00 A.M. on the following day?
50.0 mg
25.0 mg
6.25 mg
3.13 mg
12.5 mg


Answers:    The time elapsed is 26 hours. If a partially life is 13 hours, 2 partly lives have passed. Every time a partly life pass, half of the textile has past its sell-by date. 12.5mg of I-123 remain. (50/2)/2)=12.5. Hope this helps.

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