A) \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\]
B) \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]
C) \[[Ne]3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}4{{p}^{4}}\]
D) \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{1}},4{{s}^{2}}4{{p}^{3}}\]
Correct Answer: B
Solution :
3d subshell filled with 5 electrons (half-filled) is more stable than that filled with 4 electrons. \[1,\,4s\] electrons jumps into \[3d\] subshell for more sability.
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