A radioactive substance has a half-life of 20 hours. What fraction of the original radioactive
PHYSICS
WAEC 1990
A radioactive substance has a half-life of 20 hours. What fraction of the original radioactive nuclei will remain after 80 hours?
- A. 1/32
- B. 1/16
- C. 1/8
- D. 1/4
Correct Answer: B. 1/16
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