2. Exponential drop of activity (i) Define activity and state its units. (ii) Explain the following terms: a. natural lifetime b. biological lifetime (when a radionuclide) is introduced to a living organism c. effective half-life (iii) The radionuclide Y is used in nuclear imaging and it has a physical half-life of 6.5 hours. The biological half-life of this element is 7.6 hours. The initial activity the radionuclide administered to a patient is 2000 MBq. How many hours after the administration of the

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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2. Exponential drop of activity
(i) Define activity and state its units.
(ii) Explain the following terms:
a. natural lifetime
b. biological lifetime (when a radionuclide) is introduced to a living organism
c. effective half-life
(iii) The radionuclide Y is used in nuclear imaging and it has a physical half-life of 6.5 hours.
The biological half-life of this element is 7.6 hours. The initial activity the radionuclide
administered to a patient is 2000 MBq. How many hours after the administration of the
radiopharmaceutical will its will activity drop to 125 MBq ?
Transcribed Image Text:2. Exponential drop of activity (i) Define activity and state its units. (ii) Explain the following terms: a. natural lifetime b. biological lifetime (when a radionuclide) is introduced to a living organism c. effective half-life (iii) The radionuclide Y is used in nuclear imaging and it has a physical half-life of 6.5 hours. The biological half-life of this element is 7.6 hours. The initial activity the radionuclide administered to a patient is 2000 MBq. How many hours after the administration of the radiopharmaceutical will its will activity drop to 125 MBq ?
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