Questions
If the half lives of a radioactive elements for and are 3 years and 6 years respectively, then percentage of the elements that remains after 10 years will be
detailed solution
Correct option is C
Effective half life =T1/2=t1t2t1+t2=6×36+3=2years For 10 years , n=tT1/2=102=5 half lives Decay Law, NNo=12n=132 ⇒NNo×100=132×100=3.125 %Talk to our academic expert!
Similar Questions
In the chemical analysis of a rock the mass ratio of two radioactive isotopes is found to be 100:1. The mean lives of the two isotopes are 4109 yr and 2109 yr, respectively. If it is assumed that at the time of formation the atoms of both the isotopes were in equal proportion, the age of the rock p1010yr, where the value of p is ... Take, ratio of the atomic weights of the two isotopes is 1.02:1.)
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