Atomic structure (hydrogen): Which of the following is NOT an isotope of hydrogen? Recall the three isotopes of hydrogen and identify the odd one out. Choose the correct option.
General Knowledge
General Science
Difficulty: Easy
Choose an option
Answer
Correct Answer: Hydronium (H3O+)
Explanation
What is being asked?Pick the option that is not a hydrogen isotope.
Given data
- Hydrogen isotopes: protium (¹H), deuterium (²H or D), tritium (³H or T)
Concept/ApproachHydronium is a polyatomic ion (H3O+) formed when H+ associates with water; it is not an isotope (same element with different mass numbers).
Final AnswerHydronium (H3O+)