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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
Atomic mass number is sum of number of:
  • A
    Protons and electrons
  • ✓
    Protons and neutrons
  • C
    Neutrons and electrons
  • D
    None of the above
✓

Answer

Correct option: B.
Protons and neutrons
Atomic mass number is sum of number of protons and neutrons in an atom of the element.

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