Q. 7

Which of the foll A. +2

B. +3

C. +4

D. +5

Answer :

Lanthanoids show +3 oxidation state more commonly. They have a general electronic configuration of [Xe] 4fn 6s2, where it is easier to remove the 6s electrons than 4f. Removing more than one 4f electron becomes difficult and therefore the oxidation state of +3 is more common.

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