A) \[1{{s}^{2}},2{{s}^{2}},\,\,2{{p}^{6}},\,\,3{{s}^{2}},\,\,\,3{{p}^{6}},\,\,4{{s}^{2}}\]
B) \[1{{s}^{2}},2{{s}^{2}},\,\,2{{p}^{6}},\,\,3{{s}^{2}},\,\,\,3{{p}^{6}},\,\,3{{d}^{2}},\,4{{s}^{2}}\]
C) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}},\,\,\,3{{p}^{6}}3{{d}^{10}},\,4{{s}^{2}}4{{p}^{2}}\]
D) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}},\,\,\,3{{p}^{6}}3{{d}^{10}},\,4{{s}^{2}}4{{p}^{1}}\]
Correct Answer: B
Solution :
We know that transition elements are those elements which have partially filled fi?-subshell in their elementary form. Therefore, the general electronic configuration of d-block element is\[\left( n-1 \right){{d}^{1\,-\,10}}n{{s}^{1\,-\,2}}\].
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