Q. Which of the following isotopes is not radioactive?

  • (A) Uranium-235
  • (B) Carbon-12
  • (C) Radium-226
  • (D) Plutonium-239
✅ Correct Answer: (B) Carbon-12
Explanation: Carbon-12 is stable and non-radioactive, while the others are radioactive isotopes.

Published by Tina Singh ⭐ 14.18K Points at 11-Oct-2025 08:52 am in Physics

Explanation by: Tina Singh
Carbon-12 is stable and non-radioactive, while the others are radioactive isotopes.

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