GKFix MCQ Question

Why do actinoid elements generally have even more complex chemistry than lanthanoids?

• A. Because they are radioactive.
• B. Because the 5f orbitals are less buried and more involved in bonding compared to 4f orbitals, and actinoids exhibit a wider range of accessible oxidation states.
• C. Because they were discovered later.
• D. Because they have higher atomic numbers.