Technetium-99m is a metastable nuclide used in numerouscancer diagnostic and treatment programs. It is prepared just be-fore use because it decays rapidly through γ emission:99mTc→ 99Tc +γ.Use the data below to determine (a) the half-life of 99mTc; (b) the percentage of the isotope that is lost if it takes 2.0 h to prepare and administer the dose. Time (h)y Emission (photons/s)5000.43150.82000.121250.1678820495

a) Given: Rate constant, k can be calculated using the given equation as follows,

Answered: Time (h) y Emission (photons/s) 5000. 4…

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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Technetium-99m is a metastable nuclide used in numerouscancer diagnostic and treatment programs. It is prepared just be-fore use because it decays rapidly through γ emission:^99mTc→ ⁹⁹Tc +γ.Use the data below to determine (a) the half-life of ^99mTc; (b) the percentage of the isotope that is lost if it takes 2.0 h to prepare and administer the dose.

Time (h)
y Emission (photons/s)
5000.
4
3150.
8
2000.
12
1250.
16
788
20
495

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