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The half-life of a radioactive element is 5 Calculate its decay constant

Physics
WAEC 1999
The half-life of a radioactive element is 5 Calculate its decay constant
  • A. 0.113s-1
  • B. 0.436 s-1
  • C. 0.139 s-1
  • D. 0.193 s-1.
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Correct Answer: Option C
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