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

  • question_answer
      Write the mass number of neon and argon from the data given below. 
    Elements Number of protons Number of neutrons
    Neon 10 10
    Argon 18 22

    Answer:

      Mass number = Number of protons + Number of neutrons For neon, mass number =10+10= 20 For argon, mass number = 18 + 22 = 40


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