GKFix MCQ Question

Which 3d series element is expected to have the highest third ionization enthalpy, and why?

• A. Iron (Fe), due to its higher atomic number.
• B. Manganese (Mn), because removing the third electron disrupts the stable half-filled 3d^5 configuration.
• C. Chromium (Cr), because of its unique electronic configuration.
• D. Vanadium (V), as it has fewer electrons.