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  5. Structure of the Atom

11th Class Chemistry Structure of the Atom Question Bank 11th CBSE Chemistry Structure of the Atom

  • question_answer
    What is the difference between atomic mass and mass number?

    Answer:

                    Mass number is a whole number because it is the sum of number of protons and number of neutrons whereas atomic mass is fractional because it is the average relative mass of its atoms as compared with mass an atom of C - 12 isotope taken as 12.


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