Madelung’s rule

The final paper in this collection is very recent and appeared in the International Journal of Quantum Chemistry where articles on Madelung s rule have previously been published. It was in this journal that its founder Per Olov Lowdin first drew attention to the fact that the rule had not yet been derived from quantum mechanics.24 More recently Allen and Knight published what they claimed provided just such a long-awaited derivation.25... 

Figure 2.10 Graphical representation of Madelung s rule, showing the order in which atomic subshells are filled in a many-electron atom. Start with the li orbital and move downward following the direction of the arrows. Thus, the order goes Is < 2s < 2p < "is < ip < 4s

Wong, D.P. 1979. Theoretical justification of Madelung s rule. J. Chem. Educ., 56(11) 714-718. 

Fig. 3.1 Graphical depiction of the Madelung Rule, redrawn after (https // thespectrumofrieniannium.wordpress.com/ s=Madelung). Riemannium is a fictional element, to describe the Madelung rale...

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