What rules determine the order of filling the electronic shells of atoms?
October 29, 2020 | Education|
Up to the eighteenth element – argon – the filling of the electron shells occurs in accordance with the basic rule: first, shells with lower values of the principal quantum number are filled, then shells with larger values. However, when filling the shells of the nineteenth and twentieth elements – potassium and calcium – deviations from this rule are observed.
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