Sent to CCL by:
"Xavier ASSFELD" [Xavier.Assfeld]*[cbt.uhp-nancy.fr]
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Dear CCLers,
This is not a scientific question. This is an historico-scientific
question!
In france, in
freshman chemistry, we teach that the energetic order of the
atomic orbitals is given by the "Klechkovski rules" (or Klechkowski,
or
Klechkovsky, or even Klechkowsky). That is to say, the enegy
increases as
(n+l) increases and for a given value of (n+l) the
energy increases as n,
where n and l are the principal and
azimutal quantum number. After a quick
search, I've
discovered that this name is also used in Belgium, in
Swizterland, and in Canada. Surprizingly three french speaking
countries...
I have found from a Belarus site that it is the
Madelung-Klechkovski rules!
And in fact most english speaking
countries seems to use the Madelung rules!
I've found the
Madelung ref :
E. Madelung
"Die Mathemaitschen Hilfsmittel des
Physikers"
3rd ed. Springer, Berlin, 1936.
Does someone knows the Klechkowski
ref?
Who is the "father" of the rules? Klechkovski or
Madelung?
Which name is used in orther countries for these
rules?
Yours.
...Xav
Chimie et Biochimie théoriques T: (33) 3 83 68 43 82
Faculté des Sciences
F: (33) 3 83 68 43 71
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