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please answer this

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Asked by Prashant DIGHE 16th January 2020, 9:55 PM
Answered by Expert
Answer:
since rate of disintegration is proportional to number of atoms present,
 
we have , dN/dt = n = λN 
 
Hence, we have, λ = n/N ..............(1)
 
Half-life T1/2 = ln2 / λ ................(2)
 
using eqn.(1), we rewrite eqn.(2) as,   T1/2 = ( 0.693 N ) / n
Answered by Expert 16th January 2020, 10:40 PM
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