Multiple choice

Which of the following is not a radio active material?

  1. Uranium

  2. Radium

  3. Plutonium

  4. Sodium

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Uranium, Radium, and Plutonium are all radioactive elements that undergo radioactive decay. Sodium is a stable, non-radioactive element commonly found in table salt (NaCl).