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A radioactive isotope has a decay constant of 10-5s4. Calculate half life

Physics
JAMB 2011

A radioactive isotope has a decay constant of 10-5s4. Calculate half life

  • A. 6.93 x 10-5s
  • B. 6.93 x 105s
  • C. 6.93 x104s
  • D. 6.93 x 10-4s
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Correct Answer: Option C
Explanation

T (1)/2 = (0.693)/λ = (0.693)/10-5
= 0.693 x 105
= 6.93 x 104 sec

There is an explanation video available below.

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Explanation Video

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