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A pure radio-chemical preparation was ob...

A pure radio-chemical preparation was observed to disintegrate at the rate of 2140 counts/minutes at 12.35 P.M. . At 3.55 P.M. of the same day, the disintegration rate of the sample was only 535 count/minutes. What is the half-life of the material?
a) 50 min
b) 100 min
c) 200 min
d) None of these

A

50 min

B

100 min

C

200 min

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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