Give reasons : (a) Mn shows maximum oxidation state in 3d series of transition elements
Give reasons :
(a) Mn shows maximum oxidation state in 3d series of transition elements
(b) Both Cr2+ and Mn3+ have d4 configuration but Cr2+ has reducing while Mn3+ has oxidising properties
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(a) The stability of a particular oxidation state depends upon the nature of the element with which the transition metal forms the compound. Mn forms a stable oxide Mn2O7. This is probably due to the ability of the oxygen to form multiple bond in the oxides.
(b) Cr+2 = [Ar] 4s03d4
Mn+3 = [Ar]4s03d4
For Cr, +3 oxidation state is more common
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