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

  • question_answer
      What is the valency of sodium atom (atomic number 11)?

    Answer:

                      The electronic configuration of sodium atom is given below:          K= 2, L= 8, M = 1. The outermost shell of sodium atom contains only one electron. Therefore, its valency is one.


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