|Structures of Micro Objects|
|Trans Fermium Elements|
|Term Schema of electron hulls (2002/06/19)|
The term schema of the electron hull in an arbitrary atom
is obtained by solving the Schrödinger equation
for a sufficiently detailed Coulomb potential.
For any electron state, we denote by
n ... the principal quantum number (shells K,L,... with n = 1,2,...),
l ... the orbital angular momentum (orbitals s,p,... with l = 0,...,n),
m ... the magnetic quantum number (m = -l,...,l).
Boldface state numbers denote closed hull shells
and are called shell magic numbers.
At Z = 121 the Term Schema becomes irregular,
since not only the 8s-orbital but even a part of the 8p-orbital
lies lower than the 5g- (a totally new feature), 6f-, and 7d-orbitals.
The other part of the 8p-orbital, however, lies above the 9s- and 9p-orbitals.
This is the reason why the 8th and 9th period do not show the
Seaborg parallel alignment configuration
which was characteristic for the 6th (lanthanides) and 7th (actinides) period.
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