2. Questions Bank
  3. 9th Class
  4. Science
  5. Structure of the Atom

9th Class Science Structure of the Atom Question Bank Atomic Structure Conceptive Subjective Problems

  • question_answer
    Most elements have fractional atomic masses because (a) they have isotopes (b) their isotopes have different masses (c) their isotopes have non-integral masses (d) the constituent neutrons, protons and electrons combine to give fractional masses.

    Answer:

    Due to existence of isotopes, they have different atomic masses.


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