Nuclear Medicine question n answers graded A+ 2023

Nuclear Medicine question n answers graded A+ 2023The nuclear stability of an element is principally determined by the a. number of valence electrons. c. neucleon to electron ratio. b. neutron to proton ratio. d. atomic number. - correct answer b. neutron to proton ratio. The radioactive elements Carbon-12, Carbon-13 and Carbon-14 are ______ to each other a. isobars c. isotopes b. isomers d. isotones - correct answer c. isotopes In order to achieve nuclear stability, a radionuclide may emit a. beta particles. c. positrons. b. gamma photons. d. all of the above - correct answer d. all of the above The unit of radioactivity commonly used in nuclear medicine is the a. Becquerel. c. Tesla. b. Curie. d. Coulomb. - correct answer b. Curie. A milliCurie is a. abbreviated as mCi. c. 37 MBq. b. 3922 counts per second. d. all of the above - correct answer d. all of the above The time it takes for a radioactive nucleus to decay to 1/2 its original activity level is termed its a. half-value layer. c. inverse decay quotient. b. half-life. d. decay scheme. - correct answer b. half-life. The physical half-life of technetium-99 is approximately a. 110 minutes. c. 6 hours. b. 2 hours. d. 73 hours. - correct answer c. 6 hours. The biological half-life of a radionuclide takes into account its a. physical decay scheme. b. physical half-life. c. metabolism within the human body. d. effective half-life. - correct answer c. metabolism within the human body. All of the following are true of a radionuclide effective half-life EXCEPT: a. It takes into account the relationship between physical and biologic half-lives. b. It is the product of the physical and biologic half-lives divided by the sum of the physical and biologic half-lives. c. It is always shorter than either the physical half-life or biologic half-life. d. It is of little importance as a consideration of radionuclides used for medical diagnosis. - correct answer d. It is of little importance as a consideration of radionuclides used for medical diagnosis. Historically, the discoverer of radioactivity was a. Pierre and Marie Curie. c. Henry Becquerel. b. Michael Faraday. d. Albert Einstein. - correct answer c. Henry Becquerel. The isotope of choice for most nuclear medicine medical procedures is a. Gallium-67. c. Fluorine-18. b. Iodine-131. d. Technetium-99m. - correct answer d. Technetium-99m. Technetium-99m is an ideal isotope because of its a. long half-life. c. low energy range. b. alpha particle emissions. d. none of the above - correct answer d. none of the above