Talk:Electron configurations of the elements (data page)

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Visualisation project[edit]

Hi! May I recommend a project? It would be very useful to see the progression of electron configurations in the table of elements. Is there anyone who could produce this picture or participate in its production? Probios (talk) 16:02, 28 February 2013 (UTC)

This page is intended as an authoritative data collection with citation of sources, that may be cited as a central reference by other articles (such as for the chemical elements). Femto 10:05, 19 July 2005 (UTC)


Today Lanthanum-138 changed the configuration of nickel from [Ar]3d8 4s2 to [Ar]3d9 4s1. Actually nickel should be labelled as disputed, as noted at Electron configuration with a link from the word "disputed" to a detailed explanation at Nickel. The present References section of this page says that "All sources concur with the data above except in the separately listed instances"; if they concurred with [Ar]3d8 4s2 previously, then the same sources do not concur with [Ar]3d9 4s1 now.

Can we modify this data page so that it gives both configurations with an explanatory note or link, as in the Electron configuration article? Dirac66 (talk) 18:14, 30 April 2011 (UTC)

Reference by Haire[edit]

This newly added reference seems to be the only source for the undiscovered elements, Z > 118. Could we please have more information on what it contains. Perhaps a sentence such as This article contains predicted electron configurations for the elements 119-168, based on approximate relativistic Hartree-Fock-Dirac calculations with configuration interaction and spin-orbit coupling by X and Y (journal reference). Note that my version is probably incorrect because I have not seen the article and I am guessing, but it illustrates the level of detail which I believe should be added to the mention of Haire's article. Dirac66 (talk) 15:04, 3 December 2012 (UTC)

Yes check.svg Done Double sharp (talk) 06:10, 4 December 2012 (UTC)

Chromium and other exceptions[edit]

To Bobdolan22 and everyone else who keeps trying to "correct" chromium: The point is that the Madelung rule (1s, 2s, 2p, 3s, 3p, 4s, 3d, etc.) is only an approximation, and there are lots of exceptions of which chromium is the first. Yes, the rule would say that Cr is 4s23d4, but the experimental atomic spectrum shows that it is actually 4s13d5. This article gives the true experimental configurations, even when they disagree with the Madelung rule. For more discussion see Electron configuration#Aufbau principle and Madelung rule. Dirac66 (talk) 01:06, 25 March 2013 (UTC)

Perhaps interesting cases and exceptions to important "rules", like that which you mentioned, can be pointed out on the article in some way? JonathanHopeThisIsUnique (talk) 04:07, 7 January 2016 (UTC)
Good idea. I have now added a second short paragraph in the introduction to the table, to explain what the rule is and to point out that there are numerous exceptions. Dirac66 (talk) 18:11, 7 January 2016 (UTC)