Mendeleev

Atomic orbitals

Explore s, p, d and f orbital shapes, orientations, quantum numbers and nodes. The viewer separates angular shape from hydrogenic radial structure—not electron paths.

Selected orbital

1s

phase +phase −
Drag to rotate · arrow keys when focused

The surface shows the angular part of a real orbital. The two tones show opposite phases of the wavefunction, not electric charge. Radial structure is shown separately below.

Hydrogenic radial model

Radial probability

The curve shows normalized r²|Rₙℓ(r)|² for hydrogen (Z = 1). Interior zeros are spherical radial nodes.

0radial nodes

Exact for hydrogen and one-electron ions after the usual 1/Z radial scaling. Multi-electron atoms have different radial functions because screening and electron–electron interactions matter; relativistic effects also matter for heavy atoms.

How to read the two views

Not a path

An orbital is a quantum state, not a trajectory followed by an electron around the nucleus.

Angular shape

The 3D surface shows directional structure. The family s, p, d or f is determined by ℓ.

Radial structure

The radial graph shows how probability is distributed with distance. Changing n can add radial nodes even when the angular family stays the same.

Nodes and phase

At a node the wavefunction is zero. The two surface tones show opposite phase, not positive and negative charge.

Four subshell families

The number of real orientations follows 2ℓ+1. Each individual orbital can hold at most two electrons.

Why pₓ is not “mℓ = +1”

The magnetic quantum number mℓ has 2ℓ+1 allowed values from −ℓ to +ℓ. Familiar real orbitals such as pₓ, pᵧ and dxy are real linear combinations of the complex mℓ eigenfunctions, so each familiar real orbital cannot be assigned one unique mℓ value.

Electron configuration →Periodic table →