A) Cr
B) V
C) Fe
D) Mn
Correct Answer: D
Solution :
Manganese has the following electronic configuration \[{}_{25}Mn=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{2}}\] It shows +7 oxidation state by losing all the seven electrons in 3d and 4s-sub-shells. Thus, it shows maximum oxidation state. (e.g., in \[KMn{{O}_{4}},\]O.S. of \[Mn=+7\])
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