MDCAT Chemistry MCQ #5146

The half-life of a radioactive substance is 10 years. What fraction remains after 30 years?

MDCAT Chemistry MCQ #5146

  1. Question 1

    Q1. The half-life of a radioactive substance is 10 years. What fraction remains after 30 years?

    • A) 1/8
    • B) 1/4
    • C) 1/2
    • D) 1/16

    Answer: 1/8

    Explanation: After 3 half-lives (30 years), (1/2)^3 = 1/8 remains.