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. 100 90 - 80 70 - 60 - 50 - 40 - 30 - 20 - 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)

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. 100 90 - 80 70 - 60 - 50 - 40 - 30 - 20 - 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)

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...

See similar textbooks

Similar questions

A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 22.00 µmol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/8 of the initial amount. sample A B C D symbol 75 34 133 54 95 41 227 radionuclide 89 Se Xe Nb Ac half-life 120. days 5.0 days 35.0 days 22. years initial radioactivity (choose one) î (choose one) ↑ (choose one) ŵ (choose one) ↑ time for amount of radionuclide to decrease to 1/8 of initial amount X days days days years Ś
Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β– emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and neutrons does the 106Ru nucleus contain? Identify the missing daughter nucleus in the β– emission decay of 106Ru below. How many years after 106Ru is implanted in the eye does it take for its decay rate (or activity) to be reduced to 27.5% of the initial decay rate? Use 1 year = 365 days.
Some Radioactive Isotopes Useful in Medical Imaging Mode of Isotope Decay Half-life Use in Medical Imaging B*, y B+, y 20.3 m Brain scan to trace glucose metabolism Brain scan to trace glucose metabolism Detect eye tumors 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 Brain, liver, kidney, bone scans; diagnosis of damaged heart muscle Diagnosis of thyroid malfunction Kidney scan Heart scan and exercise stress test Carbon-11 Fluorine-18 F P Cr Fe Ga 109 m 14.3 d Phosphorus-32 Chromium-51 Iron-59 Gallium-67 Selenium-75 Krypton-81m Strontium-81 Technetium-99m E.C., Y В, у E.C., y E.C., y 27.7 d 44.5 d 78.3 h 118 d BlKr Sr vTe 13.3 s 22.2 m 6.01 h Iodine-131 Mercury-197 Thallium-201 В, у E.C., Y E.C., y 8.04 d 64.1 h 20!TI 3.05 d (1) The radioactive isotope phosphorus-32 is used in medical imaging as indicated on the table above. How…
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 22.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/4 of the initial amount. time for amount of initial radioactivity radionuclide to decrease to 1/4 of initial amount radionuclide sample symbol half-life 51 Cr 28. days (choose one) v days A 24 179 Ta 2. years (choose one) v years B 73 201 T1 73.0 hours (choose one) v hours 81 46 Sc 84.0 days (choose one) v O days D 21 (choose one) 1 (highest) 4 (lowest)
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 17.00 μmol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/16 of the initial amount. sample A B D symbol 18 9 75 M 35 177 71 152 63 radionuclide F Br Lu Eu half-life 2. hours 98.0 minutes 7.0 days 13. years initial radioactivity (choose one) (choose one) O (choose one) (choose one) time for amount of radionuclide to decrease to 1/16 of initial amount hours minutes days years
10. How does C-14 end up in plants and animals? 29/A 09045 +8 [3] + 158 S + 11. When a plant or animals dies, what happens to the C-14? Explain using words and write the nuclear equation. 70% + [3] 12. How is the amount of C-14 found in a fossil used to determine the age of the fossil? af - + 98,
Fluorine-18, which has a half-life of 110 minmin, is used in PET scans. 2) If 120. mgmg of fluorine-18 is shipped at 7:00 A.M., how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4:10 P.M.?
QB- An alien visited our planet in year 5305 and found that humans have long gone from this planet after nuclear war. He found that humanity has destroyed itself in a nuclear war. He analysed a certain chunk of concrete and found 2.5g of 226RA and 6.8g of 206Pb. What was the year of the nuclear war? Hint: 226Ra decays to 206Pb in a number of steps with a combined half-life of 1640 years.
What mode of radioactive decay is most likely for the Sr-90 isotope? B decay 1766 gamma emission a decay RA no decay: it's a stable isotope O positron emission
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 17.00 µmol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/32 of the initial amount. 000 radionuclide sample initial radioactivity time for amount of radionuclide to decrease to 1/32 of initial amount Ar days A days B hours C hours D symbol 192 Ir 77 188 74 62 30 67 31 W Zn Ga half-life 74.0 days 69.0 days 9.0 hours 78.0 hours (choose one (choose one) (choose one) (choose one) X ?
The alchemist's dream is to produce gold from cheaper and more abundant elements. This dream was finally realized when 18 Hg was converted into gold.-198 by 80 neutron bombardment. 1. Complete the unbalanced nuclear equation below. → ⁹8 Au+? 198 80 2. Gold-198 is radioactive and has a half-life of 2.7 days. Calculate the decay constant.
oudos A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 11.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/16 of the initial amount.