= Electron configurations of the elements (data page)
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Electron configurations describe the distribution of electrons among the various atomic orbitals of an atom. Each electron configuration follows a prescribed order based on the Aufbau principle, Hund's rule, and the Pauli exclusion principle. Here is a list of the electron configurations for elements from hydrogen (atomic number 1) up to a selection of some higher atomic numbers: 1. **Hydrogen (H)**: 1s¹ 2. **Helium (He)**: 1s² 3.
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