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Why is the + 2 oxidation state of Mn (25) is quite stable, while the same is not true for iron (26)? |
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Answer» has an outer electronic configration of 3d⁵4s² --Mn₊² (losing 2 e⁻) the electronic configration becomes 3d⁵ (d-orbital is HALF-filled)Stability of a COMPOUND is increases when outer orbital is half filled or completely filled.Cr(26) has an outer electronic configration od 3d⁶4s²--Cr⁺²-- the configration now becomes 3d⁶ (which is not half or completely filled.∴ SINCE 3d⁵ is more stable than 3d⁶Mn⁺² is quite stable than Cr⁺² |
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