There are 1010 radioactive nuclei in a given radioactive element, its half-time is 1 minute. How many nuclei will remain after 30 seconds?
There are 1010 radioactive nuclei in a given radioactive element, its half-time is 1 minute. How many nuclei will remain after 30 seconds?
Option 1 -
7 * 1099
Option 2 -
105
Option 3 -
4 * 1010
Option 4 -
2 * 1010
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1 Answer
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Correct Option - 1
Detailed Solution:
Similar Questions for you
N = N0e–λt
->t = λN = N0/e
So number of nuclei decayed = N0 – N
= N0 (1- 1/e)
Density of nuclei is order of 1017 kg m–3.
Density of nuclei is order of 1017 kg m-3.
Number of half lives of Y = 3
Number of half lives of X = 6 [As half life of X is half of that of Y].
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