A) about\[\frac{1}{3}\] of substance disintefrates
B) about \[\frac{3}{3}\]of the substance disintefrates
C) about 90% of the substance disintefrates
D) almost all the substance disintefrates
Correct Answer: B
Solution :
Mean life of a radioactive substances is the period in which two third of the substance disintegrates.You need to login to perform this action.
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