Wikipedia - Configuración electrónica (ast) Wikipedia - Configuración electrónica (es) Wikipedia - Configuration électronique (fr) Wikipedia - Configurazione elettronica (it) Wikipedia - Electron configuration (en) Wikipedia - Elektron dizilimi (tr) Wikipedia - Konfigurasi elektron (id) Wikipedia - Konfigurasi èlèktron (jv) Wikipedia - Materia (es) Wikipedia - इलेक्ट्रॉन विन्यास (hi) Wikipedia - विद्युदणु विन्यास (hi) configuration (electronic)

https://doi.org/10.1351/goldbook.C01248
A distribution of the electrons of an atom or a @M03986@ over a set of one-electron wavefunctions called @O04317@, according to the Pauli principle. From one configuration several states with different multiplicities may result. For example, the ground electronic configuration of the oxygen molecule (O2) is: $$1\sigma _{\text{g}}^{2}$$, $$1\sigma _{\text{u}}^{2}$$, $$2\sigma _{\text{g}}^{2}$$, $$2\sigma _{\text{u}}^{2}$$, $$1\pi _{\text{u}}^{4}$$, $$3\sigma _{\text{g}}^{2}$$, $$1\pi _{\text{g}}^{2}$$ resulting in the $$^{3}\Sigma _{\text{g}}$$, $$^{1}\Delta _{\text{g}}$$ and $$^{1}\Sigma _{\text{g}}^{+}$$ multiplets.
Sources:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1099 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2233 [Terms] [Paper]