The activity of a sample is 64 × 10?5 Ci. Its half-life is 3 days. Th – McqOptions

MCQOPTIONS

1.	The activity of a sample is 64 × 10?5 Ci. Its half-life is 3 days. The activity will become 5 × 10?6 Ci after [MP PET 2003]
A.	12 days
B.	7 days
C.	18 days
D.	21 days
Answer» E.

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