C 18F P Cr 5ºFe Ga 7Se 81 Kr Sr 99m Tc 1311 1Hg 201T1 Some Radioactive Isotopes Useful in Medical Imaging Mode of Decay Isotope Carbon-11 Fluorine-18 Phosphorus-32 Chromium-51 Iron-59 Gallium-67 Selenium-75 Krypton-81m Strontium-81 Technetium-99m Iodine-131 Mercury-197 Thallium-201 B+, Y B+, Y B E.C., Y B. Y E.C., y E.C., Y Y B Y B, Y E.C., Y E.C., Y Submit Answer Half-life 20.3 m 109 m 14.3 d 27.7 d 44.5 d 78.3 h 118 d. 13.3 s 22.2 m 6.01 h 8.04 d 64.1 h 3.05 d (2) When the nuclide carbon-11 decays in this way: Retry Entire Group An error has been detected in your answer. Check for typos, miscalculations etc. before submitting your answer. Use in Medical Imaging Brain scan to trace glucose metabolism Brain scan to trace glucose metabolism Detect eye tumors (1) The radioactive isotope carbon-11 is used in medical imaging as indicated on the table above. In addition to gamma emission, what is the mode of decay for carbon-11 positron emission ✓ [Review Topics] [References] Use the References to access important values if needed for this question. Diagnose albinism, image the spleen and gastrointestinal tract Bone marrow function, diagnose anemias Whole-body scan for tumors Pancreas scan Lung ventilation scan Scan for bone diseases, including cancer the mass number of the product nuclide is: 11 the atomic number of the product nuclide is: 5 the name of the product nuclide is: Boron Brain, liver, kidney, bone scans; diagnosis of damaged heart muscle Diagnosis of thyroid malfunction Kidney scan Heart scan and exercise stress test 9 more group attempts remaining Cengage Learning | Cengage Technical Support 4

1 Referring to the figure below, would you except 39 Ca to be radioactive ? Explain your answer. 20 The Band of Stability 140 130 Np ratio15T Each point on the graph represents a stable atom 120 110 100 90 Band of stability 80 70 60 np ratie- 1.2 50 Np ratisw 10 40 30 20 Hhe nip atie10 10 O 10 20 30 40 50 60 70 80 90 Number of protons Next Number of neutrons

Q6

311 Vc For the fictitious element, vaccinium, the correct information is a) atomic mass = 121, p* = 311, e = 311, n° = 189. %3D O b) p* = 121, e = 121, n° = 190 with an mass number of 311 and atomic number %3D of 121. c) is an isotope with alpha decay and a mass number of 311. Od) p* 121, e = 311, n° = 189 %3D %3D %3D

238 92U +15n - What element is synthesized from the reaction: > 70-1B + _? 25385AE 25399Et 146100FM 246 144FI

Indicate the number of protons, neutrons, and nucleons in these nuclei: Nuclide Protons Neutrons Nucleons (a) Te 128 52 (b) S 16