question_answer

The electronic configuration of\[M{{n}^{2+}}\]is

A)  \[[Ne]3{{d}^{5}},4{{s}^{0}}\]

B)  \[[Ar]3{{d}^{5}},4{{s}^{2}}\]

C)  \[[Ar]3{{d}^{5}},4{{s}^{0}}\]

D)  \[[Ne]3{{d}^{5}},4{{s}^{2}}\]

Correct Answer: C

Solution :

 \[Mn(25):1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},3{{d}^{5}},4{{s}^{2}}\] \[M{{n}^{2+}}:1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},3{{d}^{5}},4{{s}^{0}}\] \[M{{n}^{2+}}:[Ar]3{{d}^{5}},4{{s}^{0}}\] or