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Four successive members of the first row...

Four successive members of the first row transition elements are listed below with their atomic number. Which one of them is expected to have the highest third ionisation enthalpy ?

A

Vanadium (Z = 23)

B

Chromium (Z = 24)

C

Manganese (Z = 25)

D

Iron (Z = 26)

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The correct Answer is:
C
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