What will happen in a time of 7 hours, if a radioactive substance has an average life of 7 hours?
Correct answer: C. More than half of the active nuclie decay
- A. Half of the active nuclie decay
- B. Less than half of the active nuclie decay
- C. More than half of the active nuclie decay
- D. All active nuclie decay
Explanation
In one average life, i.e. at 7 hours,63.2% of the active nuclie will decay. Therefore, in a time of 7 hours, it can be considered that more than half of the active nuclie will decay.
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