Iodine-123,which Is Used for Diagnostic Imaging in the Thyroid,has a Half-Life

question 60

Multiple Choice

Iodine-123,which is used for diagnostic imaging in the thyroid,has a half-life of 13 h.If 50.0 mg of I-123 were prepared at 8:00 A.M.on Monday,how many mg remain at 10:00 A.M.on the following day?

• A)50.0 mg
• B)25.0 mg
• C)12.5 mg
• D)6.25 mg
• E)3.13 mg

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