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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
How many neutrons are present in the nucleus hydrogen atom?
  • A
    1
  • B
    2
  • C
    3
  • D
    0
✓

Answer

  1. 0

Explanation:

Hydrogen exists as three different isotopes. H-1, H-2, and H-3. H-1 is hydrogen with a proton in the nucleus and exists in nature as H2. This is the most common form of hydrogen.

H-2, also known as deuterium, has one proton and one neutron in its nucleus.

H-3, also known as tritium, has one proton and two neutrons in its neucleus. Tritium is a radioactive isotope.

So while the most common form of hydrogen has no neutrons in its neucleus, other isotopes do.

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