▸ Building the |ψ|² electron probability cloud (3D)…
▸ Orbital shapes: s (sphere) · p (dumbbell) · d (cloverleaf) · f
▸ Loading the four quantum numbers n, l, mₗ, mₛ + the Pauli principle
▸ Aufbau filling order 1s 2s 2p 3s 3p 4s 3d… + Hund’s rule
▸ Ready — drag to rotate. ✅