Questions
A sample radio active subsistence has 106 radio active nuclei. It's half-life is 20 sec. How many nuclei will remain after 10 seconds?
detailed solution
Correct option is A
N=N02t/T=106210/20=10621/2 ∴N=1062=0.707 x 106=7 x 105Talk to our academic expert!
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The half life period of a radioactive element X is same as the mean life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
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