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NEETChemistryd and f Block Elements

Why does the ionization enthalpy of Fe2+ lower than that of Mn2+?

Options

  1. AFe2+ has d6 configuration
  2. BFe2+ has fewer s electrons
  3. CFe2+ has a higher atomic number
  4. DMn2+ has a d5 configuration

Correct answer

A. Fe2+ has d6 configuration

Step-by-step solution

Fe2+ has d6 configuration and Mn2+ has 3d5 configuration. Hence, ionisation enthalpy of Fe2+ is lower than the Mn2+ .

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