A) 3
B) 5
C) 6
D) 4
Correct Answer: A
Solution :
Key Idea: Write the electronic configuration of Mn in ground state then \[M{{n}^{4+}}\]. Draw the orbitals to find unpaired electrons. Mn- (At. no. = 25) \[=1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},4{{s}^{2}}3{{d}^{5}}\] \[\therefore \,\,\,M{{n}^{4+}}1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},4{{s}^{0}},3{{d}^{3}}\] \[\therefore \,\,M{{n}^{4+}}\] has three unpaired electrons.You need to login to perform this action.
You will be redirected in
3 sec