Mn⁺ has a 3d⁵4s¹ configuration, while Cr⁺ has a d⁵ configuration. The absence of loss of exchange energy in the d⁶ configuration of Mn⁺ leads to lower ionization enthalpy compared to Cr⁺, showcasing the influence of exchange energy on stability and ionization.
Why does the ionization enthalpy of Mn⁺ differ from Cr⁺, and how is the concept of exchange energy related to their electronic configurations?
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The ionization enthalpy of Mn⁺ differs from Cr⁺ due to their electronic configurations. Mn⁺ has a 3d⁵4s¹ configuration, whereas Cr⁺ has a d⁵ configuration. In the absence of loss of exchange energy in the d⁶ configuration of Mn⁺, its ionization enthalpy is lower than that of Cr⁺. Exchange energy is responsible for stabilizing energy states, and its absence in the d⁶ configuration contributes to a lower ionization enthalpy for Mn⁺ compared to Cr⁺. The unique electronic configuration and the concept of exchange energy play a crucial role in determining their ionization enthalpies.