Electron Configuration Calculator
Gives the ground-state electron configuration of any element from the aufbau order, with the noble-gas shorthand and the number of valence electrons.
Read the full guide to this tool
Results
Notes
- Electrons fill subshells in order of increasing energy (the Madelung rule): 1s, 2s, 2p, 3s, 3p, 4s, 3d, …
- About twenty elements (chromium, copper, and others) break the simple rule to gain a half- or fully-filled subshell.
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