Praxis II General Science

Category - Chemistry

There are many elements that produce radiation of some sort. Which of the following elements is not radioactive?
  1. Uranium
  2. Palladium
  3. Radium
  4. Francium
  5. Plutonium
Explanation
Answer: B - Palladium is a commonly used catalyst and is not radioactive. The other four elements have primarily unstable radioactive isotopes.
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