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

  • question_answer
           An atom of an element has two electrons in the outermost M shell. State    (a) electronic configuration (b) atomic number (c) number of protons (d) valency of this element

    Answer:

      (a) Electronic configuration (b) Atomic number =2+8 + 2=12         (c) Number of protons =12                 (d) 2, because there are 2 valence electrons.


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