Illustrative electron shells — orbital shapes, not a single real element.
Nucleus — 6 protons · 6 neutrons (jittered cluster)
1s — n=1, l=0 · spherical shell
2p — n=2, l=1 · dumbbell lobe (x‑axis)
2p — n=2, l=1 · dumbbell lobe (z‑axis)
3d — n=3, l=2 · four-lobe cloverleaf (y‑axis)
3d — n=3, l=2 · four-lobe cloverleaf (x‑axis)
5 electrons shown · drag to orbit, scroll/pinch to zoom, toggle 2D for a flattened top‑down view.