Electron configuration

IB Chemistry: Electron configuration

Practically the diagram on the left can be used to determine the order in which orbitals are filled by electrons. It is known either as the Madelung rule or as the Klechkowski rule although in practice many people know it simply as the n+1 rule. The rule does not actually work for chromium and copper. The order can be more logically deduced by looking at graphs of ionization energies or from the position of elements...


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