Electron Configuration Calculator
Get the ground-state electron configuration, noble-gas notation and valence electrons of any element.
How to use the Electron Configuration Calculator
- Enter or select: Element (symbol, name or atomic number).
- The results (Element, Full configuration, Noble-gas notation, Electrons in outermost shell, Unpaired electrons (Hund)) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- Aufbau order: 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p
About this tool
Known exceptions to the Aufbau principle (Cr, Cu, Mo, Ag, Au, lanthanides…) are included.