8.32 Name the members of the lanthanoid series which exhibit oxidation states and those which exhibit oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.
Members of the lanthanoids which exhibits +4 oxidation states are-
members who exhibit +2 oxidation states =
After losing 4 electrons attains stable configuration and also the same thing happen to
In the case of and , after losing two electrons they also get their stable electronic configuration.