Practice question

Given: The number of unpaired electrons in Mn^{2+ (Z = 25) is: These values define the system as per NCERT data. Formula: Mn: 3d⁵ 4s². This is standard NCERT relation. Substitution & Calculation: Mn^{2+ : 3d⁵ . All 5 electrons are unpaired in the 3d orbitals, per Hund’s rule. Result: The computed value matches expected outcome and confirms correct choice as per NCERT.