Question:
Which one of the following first row transition elements is expected to have the highest third ionization enthalpy?
Which one of the following first row transition elements is expected to have the highest third ionization enthalpy?
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For transition elements, the ionization enthalpy increases across the period due to increased nuclear charge and stability of electronic configurations.
Updated On: Jul 7, 2025
- Iron (Z = 26)
- Manganese (Z = 25)
- Chromium (Z = 24)
- Vanadium (Z = 23)
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The Correct Option is B
Solution and Explanation
The third ionization enthalpy of transition elements increases as we move across the period due to increasing nuclear charge. Manganese has a half-filled d-subshell configuration, making it relatively stable and requiring more energy to remove the third electron. Hence, Manganese (Z = 25) has the highest third ionization enthalpy.
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