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

  • question_answer
                Composition of the nuclei of two atomic species 'X' and 'Y' are given as under      X     Y Protons     6      6 Electrons   6      8 Give the mass numbers of X and Y. What is the relation between the two species?         

    Answer:

                      Mass number of X = 6 + 6 = 12 Mass number of Y = 6 + 8 = 14 Atomic number of X = 6 Atomic number of Y = 6 X and Y are isotopes, since both the elements have same atomic number and different mass number.


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