Concept explainers
(a)
Interpretation:
The percentage of strontium-90 remains after
Concept Introduction:
The radioactive law states that the probability per unit time that a nucleus will decay is a constant independent of time. This constant is called the decay constant and is denoted by
Radioactive decay law,
Where N is the number of radioactive nuclei remaining after time t.
N0 is the number of radioactive nuclei in initial time.
k is the decay constant.
t is the time required to decay.
(b)
Interpretation:
The percentage of iodine-131 remains after
Concept Introduction:
Refer to part (a).
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