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20 April, 06:46

Give the chemical symbol for one element with an electron configuration that ends with np2, where n is any principal quantum number

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  1. 20 April, 06:50
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    Remember any electronic configuration ending on np² means that it has a complete ns² orbital filled, So, the electronic configuration can be written as,

    ns², np²

    Now,

    Let suppose n = 2, so the electronic configuration will be

    1s², 2s², 2p²

    As n = 2 is the valence shell, so it belongs to 2nd Period.

    As there are 4 electrons in valence shell, so, Group number is 4-A.

    Looking at Period 2 and Group-IV A, the element found is,

    Carbon
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