Atomic orbitals: 2p radial distribution function

Schematic plot of the 2p radial distribution function 4πr²ψ_2p²

For 2p-orbitals, the radial distribution function is related to the product obtained by multiplying the square of the radial wave function R_2p by r². By definition, it is independent of direction.

All of p-orbitals have one planar node, The 2p radial distribution function show no radial nodes but the higher p orbitals do. The number of nodes is related to the principal quantum number, n. In general, the np orbital have (n - 2) radial nodes. Therefore, the 2p-orbital has (2 - 2) = 0 radial nodes, as shown in the above plot. Radial nodes become evident in the higher p-orbitals ( 3p, 4p, 5p, 6p, and 7p).