Why Calcium has an electronic configuration of 2,8,8,2 and not 2,8,9,1 ?
Since, electrons in M shell is 8 , so why?
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According to octet rule, the outermost shell of an atom can accommodate maximum 8 electrons (except K shell which can accommodate maximum 2 electrons). Hence, the electronic configuration of potassium is 2,8,8,1 and not 2,8,9.
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