English: Atomic hydrogen-like single-electron orbital showing ${\displaystyle ({\psi }_{n=4,l=1,m=-1}-{\psi }_{n=4,l=1,m=1})/\sqrt{2}}$, also called 4px-orbital for its alignment in x-direction. The image is a 3D rendering of the spatial density distribution of |𝜓|² with the color depicting the phase of 𝜓. The spatial distribution is smooth and vanishes for large radii. The cloud is a more realistic representation of an orbital than the more common solid-body approximations. At full resolution, 1Å=6.3px.