GKFix MCQ Question

What is the primary factor that makes the +3 oxidation state the most stable for Lanthanoids?

• A. The resulting Ln³⁺ ion achieves a stable 4fⁿ electronic configuration
• B. The low ionization energy for the third electron
• C. The high electronegativity of Lanthanoids
• D. The large atomic size of Lanthanoids