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…

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter20: Nuclear Chemistry

Section: Chapter Questions

Problem 17E

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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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