Platinum Electron Configuration
Date: Spring 2010
Why is platinum's electron configuration [Xe] 4f14 5d9 6s1
instead of [Xe] 4f14 5d8 6s2? I filled the electron configuration
according to the order of filling orbitals and 6s subshell is filled
before 5d subshell. so why does the 1 electron from the 6s subshell
goes to the 5d subshell? is there any general way to spot when to
shift the electrons in the s subshells to other subshells?
especially for high atomic number atoms, where "cross over" of orbitals is
fairly common. The explanation is fairly involved and to some degree "ad
hoc". If you look in a most Inorganic Chemistry texts you will find the
explanation at several degrees of difficulty. One, but certainly not the
only one, is "Inorganic Chemistry" by James E. Huheey.
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Update: June 2012