How many half-lives are needed for a radionuclide having an activity of 200 mCi to decay to 3.125 mCi? a. 6T1/2 b. 41/2 C. 3T1/2 d. 7T1/2 After how long will Ir-192 decay to 99.5% of its original activity? The half-life of Ir-192 is 73.83 d. a. 5.37 d b. C. 0.537 d 53.7 h
How many half-lives are needed for a radionuclide having an activity of 200 mCi to decay to 3.125 mCi? a. 6T1/2 b. 41/2 C. 3T1/2 d. 7T1/2 After how long will Ir-192 decay to 99.5% of its original activity? The half-life of Ir-192 is 73.83 d. a. 5.37 d b. C. 0.537 d 53.7 h
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Transcribed Image Text:How many half-lives are needed for a radionuclide having an activity of 200 mCi to decay to
3.125 mCi?
a. 6T1/2
b. 4T1/2
C. 3T1/2
d. 7T1/2
After how long will Ir-192 decay to 99.5% of its original activity? The half-life of Ir-192 is
73.83 d.
a. 5.37 d
b.
C.
d.
0.537 d
53.7 h
1 d
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