Question on: SS2 Physics - Modern Physics - Nuclear Physics
The half-life of a radioactive substance is defined as:
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A
The time it takes for half of the radioactive atoms to decay
B
The time it takes for all of the radioactive atoms to decay
C
The time it takes for the radioactive substance to become stable
D
The time it takes for the radioactive substance to emit gamma rays
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Correct Option: A
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