The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
- A. 4 days
- B. 12 days
- C. 16 days
- D. 8 days
- E. None of these
Explanation
A half-life is the time required for half of a radioactive sample to decay. Since 10 mg becomes 5 mg after one half-life, the required time is 8 days.
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