An illustration of the shape of the 3d orbitals.
The transition metal series is defined by the
progressive filling of the 3d orbitals. These five orbitals have the
following ml values:
ml=0, ±1, ±2,
Hydrogen | Fluorine | Methane | Ethylene | Acetylene | Allene | Benzene | p-orbitals | d-orbitals | f-orbitals