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An Isotope of Tc Having a Half-Life of 6

Question 24

Multiple Choice

An isotope of Tc having a half-life of 6.0 h is used in bone scans.If a certain amount of this Tc is injected into the body,how long does it take for its initial decay rate to decrease BY 99%?


A) "0.060 h"
B) "3.3 h"
C) "33 h"
D) "40 h"
E) "slightly more than a month"

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