MDCAT Physics MCQ #2576

A sample of 1000 atoms decays to 250 in 12 hours. What is its half-life?

MDCAT Physics MCQ #2576

  1. Question 1

    Q1. A sample of 1000 atoms decays to 250 in 12 hours. What is its half-life?

    • A) 4 hours
    • B) 6 hours
    • C) 8 hours
    • D) 12 hours

    Answer: 6 hours

    Explanation: Decays by 1/4 in 12 hours → 2 half-lives. Option C ignores exponent.