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Question

The radioactivity of a sample is R1 at a time T1 and R2 at a time T2. If the half-life of the specimen is T, the number of atoms that have disintegrated in the time (T2-T1) is proportional to:


A
(R1T1-R2T2)
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B
(R1 - R2 )
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C
(R1 - R2 )/T
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D
(R1 - R2 )T/0.693
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