Knowing that a sample of 165 Dy with an activity of 1100 counts/s has an activity of just 1.14 counts/s after 24 hours, we will calculate t,/2 for 165 Dy.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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In a treatment that decreases pain and reduces inflammation of the lining of the knee joint, a sample of dysprosium-165 with an activity of 1100 counts per second was injected into the knee of a patient suffering from rheumatoid arthritis. After 24 hours, the activity had dropped to 1.14 counts per second. Calculate the half-life of 165Dy.

 

Answer in hours.

Knowing that a sample of 165 Dy with an activity of 1100 counts/s has an activity of just 1.14
counts/s after 24 hours, we will calculate t,/2 for 165 Dy.
Transcribed Image Text:Knowing that a sample of 165 Dy with an activity of 1100 counts/s has an activity of just 1.14 counts/s after 24 hours, we will calculate t,/2 for 165 Dy.
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