Question
a sample of radioactive element has mass 10g at a instant t=0 the approximate mass of this elementcin the sample after 2
mean lives is ?
ans 1.3g
Read 1 Solution.
Use the formula N=N0 e-λt where λ = rate constant and t = time
here t= 2 mean lives= 2/λ
so N= 10 e-2 =1.3 gm. (approx)
Best SolutionNIKHIL VARSHNEY 12 year ago
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