Aufbau Explorer

Electron configuration & the Madelung (n+ℓ) rule — powered by Python in your browser (Pyodide/WASM)

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0 / 0 e⁻
H
HydrogenZ = 1nonmetal
1s¹
—
0 unpaired e⁻

An empty atom. Press Play to watch electrons occupy orbitals in energy order.