Questions
has half-life of 5 days. The time taken for seven-eighths of a sample of to decay is :
a
3.4 days
b
10 days
c
15 days
d
20 days
detailed solution
Correct option is C
78th decay means 18th will be remains i.e. 123 is remain so it is 3 half life time. so 15 days .Talk to our academic expert!
Similar Questions
The half life period of a radioactive element X is same as the mean life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
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