CBSE Class 12-science Answered
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 T1/2.
Depict in the plot the number of undecayed
nuclei at (i) t = 3 T1/2 and (ii) t = 5 T1/2.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
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 = 
, 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 = 5T1/2 is No/32
Answered by | 04 Jun, 2014, 03:23: PM
Concept Videos
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Radioactivity - Part 1
This video explains the process of radioactivity in detail. -
Radioactivity - Part 2
This video gexplains the types of radioactive decays -
Radioactivity
Radioactivity
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