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potasium element has 19 atomic mass. …

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potasium element has 19 atomic mass. So the electronic configuration is 2,8,8,1 Now, M shell is not outermost shell. So why we do not took the electronic configuration of calcium is 2,8,9,1 instead of taking 2,8,8,2

    • Posted by Parveen Garg 7 years, 1 month ago

    CBSE > Class 09 > Science
    • 3 answers

    Astha Kaushik 7 years, 1 month ago

    The last shell cannot hold more than 8 electrons

    0Thank You

    Dev Khemani 7 years, 1 month ago

    If you want to know more then tell on this Because if i would tell you extra then you can get confused

    0Thank You

    Dev Khemani 7 years, 1 month ago

    Because of physical quantum numbers we have to follow a rule that K octet can carry 2 valence electrons L octet can carry 8 valence electrons M octet can carry 8 electrons N can carry 18 valence electrons so its electronic configuration is 2,8,8,2

    2Thank You

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