Radioactive Decay Constant
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Questions and Answers

What is the unit of measurement for the decay constant of Radon-226?

  • Kilograms (kg)
  • Seconds (s)
  • Inverse seconds (s⁻¹) (correct)
  • Becquerels (Bq)

    • What is the relationship between the decay constant and the half-life of a radioactive substance?

  • The decay constant is directly proportional to the half-life.
  • The decay constant is inversely proportional to the half-life. (correct)
  • The decay constant is independent of the half-life.
  • The decay constant is equal to the half-life.

    • If the decay constant of Radon-226 is 1.37 × 10⁻⁴ s⁻¹, what is the half-life of Radon-226?

  • 1590 years
  • 1580 years
  • 1600 years
  • 1620 years (correct)

    • What is the purpose of calculating the decay constant of Radon-226?

    <p>To measure the activity of a radioactive substance.</p> Signup and view all the answers

    What is the measured activity of the 0.25 kg Radon-226 sample in the example?

    <p>9.0 × 10¹² Bq</p> Signup and view all the answers

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