Which one is the radioactive isotope of hydrogen ?
Correct answer: B. Tritium
- A. Deuterium
- B. Tritium
- C. Ortho-hydrogen
- D. None of these
Explanation
Tritium is hydrogen-3 and contains one proton and two neutrons, making it radioactive. Deuterium is hydrogen-2 and is stable, while ortho-hydrogen describes a spin form of ordinary hydrogen rather than an isotope.
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