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

  • question_answer
      (a) What is the number of electrons in  ion? (Cl =17) (b) What is the electronic configuration of phosphorus? (P = 15) (c) Which isotope of uranium is used in nuclear fuel?

    Answer:

           (a) 17+1 (gained) =18 electrons [because negative charge shows gain of electrons.]                         (b) Atomic number of phosphorus  = 15 Electronic configuration                (c) Uranium-235 isotope.  


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