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Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
Atomic number is equal to:
  • A
    Number of electrons.
  • B
    Number of protons.
  • C
    Number of neutrons.
  • D
    Difference in mass number and number of electrons.
✓

Answer

  1. Number of protons.

Explanation:

The atomic number of an element is equal to the number of protons in the nucleus.

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