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Question
Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why?
Solution
- Any subshell having a half-filled or completely filled electronic configuration has extra stability.
- The electronic configuration of Mn2+ is [Ar] 3d5 while that of Mn3+ is [Ar] 3d4. Hence, manganese in the +2 oxidation state is more stable than +3 oxidation state due to half-filled d-orbitals.
- The electronic configuration of Fe3+ is [Ar] 3d5 while that of Fe2+ is [Ar] 3d6. Hence, iron is stable at +3 oxidation state than +2 oxidation state due to half-filled d-orbitals.
RELATED QUESTIONS
Distinguish between lanthanoid and actinoids.
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The chemistry of actinoids is more complicated as compared to lanthanoids.
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The incorrect statement among the following is:
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