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A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 9.00 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 1/4 of the initial amount. radionuclide time for amount of initial sample radionuclide to decrease to radioactivity symbol half-life 1/4 of initial amount 67 Ga O hours 78.0 hours (choose one) A 31 131 8.0 days (choose one) O days 53 188 69.0 days (choose one) O days 74 149 Tb D 4. hours (choose one) hours 65 ?

A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 9.00 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 1/4 of the initial amount. radionuclide time for amount of initial sample radionuclide to decrease to radioactivity symbol half-life 1/4 of initial amount 67 Ga O hours 78.0 hours (choose one) A 31 131 8.0 days (choose one) O days 53 188 69.0 days (choose one) O days 74 149 Tb D 4. hours (choose one) hours 65 ?

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter25: Nuclear Chemistry
Section: Chapter Questions
Problem 67IL
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Initial radioactivity: 

1(highest)

2

3

4(lowest)

A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 9.00 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 1/4 of the initial amount. radionuclide time for amount of initial sample radionuclide to decrease to radioactivity symbol half-life 1/4 of initial amount 67 Ga 31 78.0 hours (choose one) hours A 131 I 53 O days 8.0 days (choose one) В 188 W 74 69.0 days (choose one) I days 149 Tb 65 4. hours (choose one) |hours ?
Transcribed Image Text:A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 9.00 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 1/4 of the initial amount. radionuclide time for amount of initial sample radionuclide to decrease to radioactivity symbol half-life 1/4 of initial amount 67 Ga 31 78.0 hours (choose one) hours A 131 I 53 O days 8.0 days (choose one) В 188 W 74 69.0 days (choose one) I days 149 Tb 65 4. hours (choose one) |hours ?
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