MCQ practice · SSC Chemistry Board questions · Chapter 3: Structure of Matter
How many isotopes does hydrogen have?
Think it through first, then pick an option.
- a 1
- b 3
- c 4
- d 7
Answer and explanation
Correct answer: d 7
The book: hydrogen has 7 isotopes, ¹H to ⁷H.
Why the other options are wrong
- a 1: Not one: the book lists seven isotopes of hydrogen, ¹H to ⁷H.
- b 3: Three occur in nature; the total number of isotopes is seven.
- c 4: Four are made in the laboratory; the total is seven.
More board questions on this topic
- How many isotopes does hydrogen have?
- How many isotopes of hydrogen are prepared in the laboratory?
- Which isotope of hydrogen has only one neutron?
- What is the number of neutrons in the last isotope of hydrogen?
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