Question
Question: In a mean life of a radioactive sample –...
In a mean life of a radioactive sample –
A
About 1/3 of the substance disintegrates
B
About 90% of the substance disintegrates
C
About 2/3 of the substance disintegrates
D
Almost all the substance disintegrates
Answer
About 2/3 of the substance disintegrates
Explanation
Solution
In a mean life 63% substance disintegrate means about 2/3 of its initial value.