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JEE Main 2003 Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main 2003

The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23 , 24,25 and 26 . Which one of these may be expected to have the highest second ionization enthalpy?

Answer: (1)

Solution

After losing one electron, has the configuration , a stable half-filled shell; removing the second electron from it requires the most energy. In contrast,

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Question ID VK-038199