what is the oxidation state of d-block elements?
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Elements /Outer electronic configuration /Oxidation states
Fe/ 3d64s2/ + 2, + 3, + 4, + 5, + 6
Co/ 3d74s2 /+ 2, + 3, + 4
+ 2, + 3, + 4Ni /3d84s2 /+ 2, + 3, + 4
+ 2, + 3, + 4Cu /3d104s1 /+ 1,+ 2
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