Before the use of technetium-99m, patients with high risk coronary artery disease wereevaluated using thallium-201 which has a half-life of 73.00 hours. If a person is exposed to5.000 μg of thallium-201, how many hours would it take to reach 10.00 % of its originalmass?3.322 hours242.5 hours21.98 hours

Answered: Image /qna-images/answer/90ee910d-481e-4d0f-9a8e-8dfe3765778b.jpg

Answered: Before the use of technetium-99m,…

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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Similar questions

Iodine-125 has a half-life of 60.4 days and is used in radiation therapy to treat prostate cancer and brain tumors. If a patient ingests 10.0 g of 1251, how much will remain after 1.00 year?
Strontium-85, used for bone scans, has a half-life of 65 days. How long will it take for the radiation level of strontium-85 to drop to one-fourth of its original level? Express your answer as an integer.
A 105.0 nanogram (ng) sample of sodium−24 was stored in a lead-lined cabinet for 2.5 d. How much sodium−24 remained? The half-life of sodium−24 is 15 hours .
Krypton-81m is used for lung ventilation studies. Its half-life is 13 ss. How long does it take the activity of this isotope to reach one-quarter of its original value?
The half-life of nickel-63 is 100.1 years. If there are 100 grams of nickel-63 present at a certain time, how grams of nickel-63 will remain in 400.4 years? 50.0 12.5 6.25 25.0 It will all be gone
Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a smoke detector (initially containing 2.1000 µg of Am), in micrograms, that has been used for 1.000 year if the half-life is 433 years.
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 13.00 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. radionuclide sample initial radioactivity symbol half-life 46 A Sc 84.0 days (choose one) 21 21 time for amount of radionuclide to decrease to 1/16 of initial amount ☐ days 91 B Y 59.0 days (choose one) ☐ days 39 ur 52 C Mn 6.0 days (choose one) ☐ days 25 18 D F 2. hours (choose one) hours 9 1 (highest) half 2 3 4 (lowest) х Ar ?
5. Strontium-90 has a half life of 28.8 years. If you start with a 10 gram sample of Strontium-90, how much will be left after 115.2 years?

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