A) \[3{{d}^{1}}4{{s}^{2}}\]
B) \[3{{d}^{3}}4{{s}^{2}}\]
C) \[3{{d}^{3}}4{{s}^{1}}\]
D) \[3{{d}^{5}}4{{s}^{2}}\]
Correct Answer: D
Solution :
[d] Maximum oxidation state ford-block elements \[~=(n-1)\] unpaired \[d{{e}^{-}}+ns{{e}^{-}}\] For \[3{{d}^{5}},4{{s}^{2}}\] configuration Maximum oxidation number \[=5+2=7\]
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