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It is observed that only 0.39% of the or...

It is observed that only 0.39% of the original radioactive sample remains ndecayed after eighrt hours. Hence:

A

the half-life of that substance is 1 hour

B

the mean life of the substance is `1/(log""_(e)2)hour`

C

decay constant of the substance is `(log""_(e)2)hour""^(-1)`

D

if the number of the radioactive nuclei of this substance at a given instant is `10""^(8)` then the number left after 30 min would be `sqrt2xx10""^(9)`

Text Solution

Verified by Experts

The correct Answer is:
a,b,c
`lamda=2.303/tlog"N""_(0)/N`,mean life `=1//lamda`
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