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9th Class Science Structure of the Atom Question Bank 9th CBSE Science Structure of the Atom

  • question_answer
      Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have?  

    Answer:

                      Number of neutrons = Atomic mass - Number of protons Therefore, the number of neutrons in the atom = 4 ? 2 = 2.


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