Question

The disintegration rate of a certain radioactive sample at any instant is 4750 disintegrations per minute. Five minutes later the rate becomes 2700 per minute. Calculate
(a) decay constant and (b) half-life of the sample

Answer 1

Correct Answer - A::B::C
(a) `R=R_0e^(-lambdat)`
`R=2700` per minute, `R_0=4750` per minute
`t=5` min
Find `lambda`. (b) `t_(1//2)=(1n2)/(lambda)`