19. lodine-123, used in thyroid therapy, has a half-ife of 13.27 hours. How manyhalf-lives are requi
問題詳情
19. lodine-123, used in thyroid therapy, has a half-ife of 13.27 hours. How manyhalf-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