GKFix MCQ Question

Why do some Lanthanoids like Ce and Yb show stable +4 and +2 oxidation states respectively?

• A. Because they have fewer electrons.
• B. Because they are radioactive.
• C. Because these states lead to stable electronic configurations (noble gas for Ce4+, half-filled or fully-filled f-subshell for others).
• D. Because they are heavier elements.