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Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 18.00 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. radionuclide sample initial radioactivity symbol half-life time for amount of radionuclide to decrease to 1/8 of initial amount 149 A Tb 4.0 hours (choose one) hours 65 122 B I 4.0 minutes (choose one) ☐ minutes 53 192 C Ir 74.0 days (choose one) ☐ days 77 52 D Mn 6.0 days ✓ (choose one) ☐ days 25 1 (highest) 2 ☑ 3 4 (lowest)

Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 18.00 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. radionuclide sample initial radioactivity symbol half-life time for amount of radionuclide to decrease to 1/8 of initial amount 149 A Tb 4.0 hours (choose one) hours 65 122 B I 4.0 minutes (choose one) ☐ minutes 53 192 C Ir 74.0 days (choose one) ☐ days 77 52 D Mn 6.0 days ✓ (choose one) ☐ days 25 1 (highest) 2 ☑ 3 4 (lowest)

Chemistry
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
Chapter19: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 72AE
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Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 18.00 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. radionuclide sample initial radioactivity symbol half-life time for amount of radionuclide to decrease to 1/8 of initial amount 149 A Tb 4.0 hours (choose one) hours 65 122 B I 4.0 minutes (choose one) ☐ minutes 53 192 C Ir 74.0 days (choose one) ☐ days 77 52 D Mn 6.0 days ✓ (choose one) ☐ days 25 1 (highest) 2 ☑ 3 4 (lowest)
Transcribed Image Text:Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 18.00 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. radionuclide sample initial radioactivity symbol half-life time for amount of radionuclide to decrease to 1/8 of initial amount 149 A Tb 4.0 hours (choose one) hours 65 122 B I 4.0 minutes (choose one) ☐ minutes 53 192 C Ir 74.0 days (choose one) ☐ days 77 52 D Mn 6.0 days ✓ (choose one) ☐ days 25 1 (highest) 2 ☑ 3 4 (lowest)
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