Questions
The half life of a sample of a radioactive substance is 2 hour. If atoms are present at , then the number of atoms decayed in the duration hours to hours will be
detailed solution
Correct option is D
Decay Law, N=N012tT12 Case 1: No. of atoms at t=2 hr’s ⇒N1=8×10101222=4×1010 Case 2: No. of atoms at t=6 hr’s ⇒N2=8×10101262=8×101018=1×1010 Hence, No of atoms decayed in given duration =(4-1) ×1010=3×1010Talk to our academic expert!
Similar Questions
The disintegration rate of a certain radioactive sample at any instant is 4750 disintegrations per minute. 5 min later, the rate becomes 2700 min-1. Then, the half-life of the sample (in min) is……..
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