How would you account for the following :Among lanthanoids, Ln (III) – InterviewSolution

1.	How would you account for the following :Among lanthanoids, Ln (III) compounds are predominant. However occasionally in solutions or in solid compounds +2 and +4 ions are also obtained.
Answer» Lanthanoids exhibit occasionally +2, +4 ions because of extra stability of empty, half-filled and completely filled 4f- subshell respectively i e, 4f⁰,4f⁷ , 4f¹⁴configuration.

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