What will happen in a time of 7 hours, if a radioactive substance has – McqOptions

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1.	What will happen in a time of 7 hours, if a radioactive substance has an average life of 7 hours?
A.	Half of the active nuclei decay
B.	Less half of the active nuclei decay
C.	More than half of the active nuclei decay
D.	All active nuclei decay
Answer» D. All active nuclei decay

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