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

  • question_answer
      The cation of an element X is represented by . Its atomic number is less than 20. Show the distribution of electrons amongst different orbits of this element. What could this element be?

    Answer:

      X + shows that the element Xhas lost three electrons. Distribution of electrons amongst different orbits (Electronic configuration) of X =2,8,5 or 2, 3. The given element could be aluminium since, its atomic number is 13 or boron with atomic number 5.


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