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Which of the following lanthanoids show ...

Which of the following lanthanoids show `+2` oxidation state besides the characteristic oxidation state +3 of lanthanoids?

A

Ce

B

Eu

C

Yb

D

Ho

Text Solution

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The correct Answer is:
B, C
`Eu^(2+) , [Xe] 4f^(7) , Yb^(2+) : [Xe] 4f^(14)` . Because of stable `f^7` (half filled) and `f^14` `(full filled) configurations in +2 oxidation states .
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