19. lodine-123, used in thyroid therapy, has a half-ife 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

答案：登入後查看
統計： A(0), B(0), C(5), D(1), E(0) #2740172

詳解 (共 1 筆)

#5907860


(共 1 字，隱藏中）
前往觀看
0
0