32. The mass of the injected bismuth-213 that remains in the patient after 2.50 is A. 1. 13 X 10-8 g B. 4.07 x 10-4 g C. 3.15 x 10- g D. 3.76 X 10-3

Use the following information to answer questions 31 and 32 and numerical-response question 10. The radioisotope bismuth-213 is used in the treatment of leukemia. There are two ways ju which bismuth-213 decays to form the stable isotope bismuth-209. 24 Pot Y- Decay nut 213 B , Pb - 209 8 Bi Decay It Decay IV TI The gamma photon produced by Decay I has an energy of 4.4 x 105 ev. In one treatment, a patient receives an injection of 3.90 x 10"g of bismuth-213. Bismuth-213 has a half-life of 46.0 minutes. 31. Which of the following rows identifies the four decays indicated above? Row Decay I Decay II Decay III Decay IV A. Beta negative Alpha Alpha Beta negative B. Beta negative Alpha Beta negative Alpha C. Alpha Beta negative Beta negative Alpha D. Alpha Beta negative Alpha Beta negative Numerical Response 10. The mass equivalence of the energy of the gamma photon associated with Decay I. expressed in scientific notation, is a.b x 10-cd kg. The values of a, b, c, and d are and (Record all four digits of your answer in the numerical-response section on the answer sheet.)