write the different Oxidation state of maganese .why + 2 Oxidation state of MN is more stable

Dear Student, 
Different Oxidation State of Manganese is +2, +3, +4, +5, +6 & +7.
+2 Oxidation state of maganese is more stable due to half filled electronic configuration of 3d orbitals. 
Electronic Configuration of Mn2+ is [Ar]3d5.
Regards. 

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