The electron configuration of a chemical element describes the distribution of electrons among the various atomic orbitals or energy states of an atom.

Table: Electron Configurations

The list below shows the individual electron distributions in the uncharged atoms of the chemical elements in the long form. The s orbitals and the noble gases are highlighted in yellow as a guide.

It means: Z = atomic number; S = chemical symbol.

Last update: 2024-09-02

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