Foundations of Chemistry

, Volume 8, Issue 3, pp 285–292 | Cite as

Commentary on Allen & Kinght’s Response to the Löwdin Challenge



This commentary provides a critical examination of a recent article by Allen and Knight in which the authors claim to provide the long-sought explanation for the Madelung, or n + ℓ, n rule for the order of orbital filling in many-electron atoms. It is concluded that the explanation is inadequate for several reasons.


Scandium Periodic Table Nodal Structure Block Element Perturbation Operator 
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I thank the reviewers for their comments and suggestions on this paper.


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Department of Chemistry and BiochemistryUCLALos AngelesUSA

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