Multiple choice general knowledge science & technology

Which of the following is not an isotope of hydrogen?

  1. Tritium

  2. Deuterium

  3. Protium

  4. Yttrium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen has three isotopes: protium (^1H), deuterium (^2H), and tritium (^3H). Yttrium is element 39 on the periodic table - a transition metal completely unrelated to hydrogen isotopes.

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