Question:
Sir, 2nd ionisation enthalpy of manganese is less than that of iron. How?
Electronic configuration of Manganese is [Ar]3d5 4s2
and
Iron is [Ar]3d6 4s2
Both have 4s2 configuration.
why both do not have same enthalpy. Sir?
Answer:
Due to Half filled configuration of Mn2+ (3d5)
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