Q18 of 37 Page 1

The initial concentration of a radioactive substance is No and its half life is 12 hours. What will be its concentration after 36 hours?

In radioactive decay, nuclear half life expresses the time required for half of a sample to undergo radioactive decay.

Exponential decay can be expressed mathematically as




Where, N is concentration after t time, No is initial concentration,


t is time and is half life.


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