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A radioactive element has a decay constant of 0.077s-1. Calculate its half-life

A radioactive element has a decay constant of 0.077s-1. Calculate its half-life
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  • A 13.0s
  • B 9.0s
  • C 5.1s
  • D 0.5s
Correct Answer: Option B
Explanation:
\(t_{\frac{1}{2}} = \frac{0.693}{\lambda} = \frac{0.693}{0.077} = 9s\)

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