The half-life period of a radioactive substance is 5 min. The amount o – McqOptions

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1.	The half-life period of a radioactive substance is 5 min. The amount of substance decayed in 20 min will be [MP PMT/PET 1998]
A.	93.75%
B.	75%
C.	25%
D.	6.25%
Answer» B. 75%

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