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Question

Chemistry Question on d block elements

Which of the following ions has the highest magnetic moment?

A

Ti3+T{{i}^{3+}}

B

Sc3+S{{c}^{3+}}

C

Mn2+M{{n}^{2+}}

D

Zn2+Z{{n}^{2+}}

Answer

Mn2+M{{n}^{2+}}

Explanation

Solution

The electronic configuration or given ions are: Ti3+(19)=1s2,2s22p6,3s23p63d1T{{i}^{3+}}(19)=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{1}} Sc3+(18)=[Ar]S{{c}^{3+}}(18)=[Ar] Mn2+(23)=[Ar] 3d5M{{n}^{2+}}(23)=[Ar]\,3{{d}^{5}} Zn2+(28)=[Ar] 3d10Z{{n}^{2+}}(28)=[Ar]\,3{{d}^{10}} As, Mn2+M{{n}^{2+}} has maximum number of unpaired electrons (5), hence, it shows maximum magnetic moment.