Home Physics Atomic and Nuclear Physics Radioactivity In a mean life of a radioactive sample
Physics Atomic and Nuclear Physics Radioactivity MCQ (Single Correct)

In a mean life of a radioactive sample

A
About 1/3 of substance disintegrates
B
About 2/3 of the substance disintegrates
C
About 90% of the substance disintegrates
D
Almost all the substance disintegrates

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Text Solution

Verified by Experts
The correct answer is:
B

By using and

Substance remains
∴ Substance disintegrated .

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