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  5. Structure of the Atom

9th Class Science Structure of the Atom

  • question_answer 27)
    If Z = 3, what would be the valency of the element? Also, name the element.

    Answer:

    The electronic configuration of (Z) = 2,1 Thus, outermost shell has 1 electron. So, its valency =1 Atomic number (Z) = 3, So name of element is lithium.  


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