Question: Aside from the series that ranges from atomic numbers 89 to 103, what series is an exception to the rule that the number of valence electrons ranges from 0-8 electrons?
Sentence (from "18-electron rule"): This means that, the combination of these nine atomic orbitals with ligand orbitals creates nine molecular orbitals that are either metal-ligand bonding or non-bonding.
Relevant evidence: No