阿摩線上測驗
25.Iodine-123, used in thyroid therapy, has a half-life of 13.27 hours. How many half-lives are
required for a 160 mg sample of iodine-123 to decay to 5.0 mg?
(A)0.031
(B)1.0
(C)5.0
(D) 32
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統計： A(0), B(0), C(7), D(0), E(0) #2740086
統計： A(0), B(0), C(7), D(0), E(0) #2740086
