English: Collection of all 14 atomic single-electron orbitals for the lowest three n quantum numbers. The three blocks show the quantum numbers n=1, n=2 and n=3, respectively. Each row shows one l-quantum number l=0 (s), l=1 (p) and l=2 (d) with m quantum numbers ${\displaystyle m\in \{-l,\ldots ,l\}}$ in ascending order. The color depicts the complex-valued phase of the wavefunction. In contrast to the real-valued orbitals in chemistry, which are superpositions of several m-eigenstates, the probability densities shown here are symmetric around the z-axis. The solid bodies enclose the volume where the continuous probability density exceeds a well-chosen threshold. The formulas that describe the orbitals can be found at Hydrogen atom. The 2s and 3s orbitals are cut open to reveal the inner structure.
The labels in the image show the quantum numbers nl_m with l encoded as letter.