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# Name the members of the lanthanoid series which exhibit +4 oxidation states and those which exhibit +2 oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.

8.32 Name the members of the lanthanoid series which exhibit $+4$ oxidation states and those which exhibit $+2$ oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.

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Members of the lanthanoids which exhibits +4 oxidation states are- $Ce, Pr,Nd,Tb,Dy$
members who exhibit +2 oxidation states = $Nd,Sm,Eu,Tm,Yb$

After losing 4 electrons $Ce^{4+}$attains stable configuration $[Xe]$ and also the same thing happen to $Tb = [Xe]4f^{7}$

In the case of $Eu$ and $Yb$ ,  after losing two electrons they also get their stable electronic configuration.
$\\Eu^{2+}=[Xe]4f^{7}\\ Yb^{2+}= [Xe]4f^{14}$

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