MDCAT Physics MCQ #2573

The half-life of a radioactive isotope is 10 days. What is its decay constant?

MDCAT Physics MCQ #2573

  1. Question 1

    Q1. The half-life of a radioactive isotope is 10 days. What is its decay constant?

    • A) 0.0693 day⁻¹
    • B) 0.10 day⁻¹
    • C) 1.44 day⁻¹
    • D) 10 day⁻¹

    Answer: 0.0693 day⁻¹

    Explanation: λ = ln(2)/T½ ≈ 0.0693. Option B ignores natural log.