Macmillan Learning Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. Sample remaining (%) 100 80- 70- 60- 50 40- time: 30- 20. 30 50 60) 70 80 90 100 110 120 130 140 150 160 170 180 190 Time Idays) If the initial sample is 8.00 g. what mass of the original iridium-192 remains after 55 days? 0 mass remaining: 10 20 30 Estimate the half-life of the radioisotope. half-life: How many days would it take for two-thirds of the sample to decay? days days

Macmillan Learning Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. Sample remaining (%) 100 80- 70- 60- 50 40- time: 30- 20. 30 50 60) 70 80 90 100 110 120 130 140 150 160 170 180 190 Time Idays) If the initial sample is 8.00 g. what mass of the original iridium-192 remains after 55 days? 0 mass remaining: 10 20 30 Estimate the half-life of the radioisotope. half-life: How many days would it take for two-thirds of the sample to decay? days days

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Topic: Nuclear Chemistry
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Some Radioactive Isotopes Useful in Medical Imaging Mode of Decay Isotope Half-life Use in Medical Imaging B+, y B+, y Carbon-11 Fluorine-18 Phosphorus-32 Chromium-51 Brain scan to trace glucose metabolism Brain scan to trace glucose metabolism Detect eye tumors Diagnose albinism, image the spleen and gastrointestinal tract 20.3 m EF 109 m 14.3 d 27.7 d 44.5 d Cr Fe SiGa E.C., Y В, у E.C., Y E.C., Y Iron-59 Bone marrow function, diagmose anemias 78.3 h 118 d Whole-body : scan for tumors Pancreas scan Lung ventilation scan Scan for bone diseases, including cancer Brain, liver, kidney, bone scans; diagnosis of damaged heart muscle Diagnosis of thyroid malfunction Kidney scan Heart scan and exercise stress test 118 d 13.3 s Strontium-81 22.2 m Technetium-99m 6.01 h 8.04 d Iodine-131 B, y 1Hg 201TI Mercury-197 Thallium-201 E.C., Y 64.1 h E.C., y 3.05 d The radioactive isotope strontium-81 is used in medical imaging as indicated on the table above. If 51.l milligrams of strontium-81 is…
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