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d and f BLOCK ELEMENTS
Question #38669
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Why is the ionization enthalpy of Fe2+ lower than that of Mn2+?
A. Fe2+ has a d6 configuration which gains stability from losing an electron, unlike the stable d5 configuration of Mn2+
B. Mn2+ has a d5 configuration which gains stability from losing an electron, unlike the stable d6 configuration of Fe2+
C. Fe2+ has a smaller ionic radius
D. Mn2+ has a larger ionic radius
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