The metal ions can also be arranged in order of increasing Δ, and this order is largely independent of the identity of the ligand.
:Mn        
In general, it is not possible to say whether a given ligand will exert a strong field or a weak field on a given metal ion. However, when we consider the metal ion, the following two useful trends are observed:
*Δ increases with increasing oxidation number, and
*Δ increases down a group.