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Question
Account for the following :
Manganese shows maximum number of oxidation states in 3d series.
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Solution
Mnexhibits all the oxidation states from (+ 2) to (+ 7)
`"_25Mn = [Ar]3d^s 4s^2`
Mn+ = 
Half filled (stable)
Mn2+ = 
Mn3 = 
Mn4+= 
Mn5+ = 
Mn6+ = 
Mn+7 = 
→ Highest oxidation state = (+7)
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