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State the law of radioactive decay.

Plot a graph showing the number (N) of undecayed nuclei as a function of time (t) for a given radioactive sample having half life

Asked by Topperlearning User 4th June 2014, 1:23 PM
Answered by Expert

According to radioactive decay law the rate of disintegration of a radioactive substance at an instant is directly proportional to the number of nuclei in the Radioactive substance at that time i.e.

N = N0e-?t, Where symbols have their usual meanings.

From graph:

No. of un-decayed nuclei at t = 3T1/2 is No/8

No. of un-decayed nuclei at t = 5 T1/2 is No/32

Answered by Expert 4th June 2014, 3:23 PM
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