# Writing electronic configurations

> Writing an atom's configuration sublevel by sublevel (e.g. 1s2 2s2 2p6 ...) and in short form with a noble-gas core such as [Ar].

> [ar-EG] إزاي تكتب الـ configuration بتاع الذرة sublevel ورا sublevel (زي 1s2 2s2 2p6 ...)، وإزاي تكتبه مختصر بـ noble-gas core زي [Ar].

Part of: Transition Elements (https://yaani.ai/ar/learn/chemistry/chem-s3-en.ch1)

## Builds on

- Aufbau principle (order of filling)
- Electron spin and the Pauli principle
- Periodic table: periods and groups


Source: https://yaani.ai/ar/concept/atom.electron-configuration-writing