What is the decay constant of a radioactive element whose half-life is 3 seconds

  • A 0.132s-1
  • B 0.23s-1
  • C 0.347s-1
  • D 0.693s-1
  • E 0.924s-1
waec 1996physics

The correct answer is B. 0.23s-1

No explanation given
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