Questions
If one starts with one curie of radioactive substance of half – life 12 hr’s , the activity left after a period of 1 week will be
a
61 micro-curie
b
140 micro-curie
c
5 micro-curie
d
2 micro-curie
detailed solution
Correct option is A
Given : Time =1 week= 7 days = 7 x24 hr’s No. of half lives=n=tT1/2=7×2412=14 Deacy Law, A=Ao12n=1×1214=116384=61×10−6=61 micro-curieTalk to our academic expert!
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