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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
All atoms contain neutrons in their nuclei except:
  • ✓
    Protium
  • B
    Helium
  • C
    Neon
  • D
    Chlorine
✓

Answer

Correct option: A.
Protium
All atoms except Protium, an isotope of Hydrogen contain neutrons in their nuclei.
As Protium has zero neutrons in the nucleus and has mass no $1.$

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