A piece of radioactive material contains 1000 atmos. If its half -life is 20seconds, the
PHYSICS
JAMB 2012
A piece of radioactive material contains 1000 atmos. If its half -life is 20seconds, the time taken for 125 atoms to remain is
- A. 20 seconds
- B. 40 seconds
- C. 80 seconds
- D. 60 seconds
Correct Answer: D. 60 seconds
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