A) \[(n-1)\,{{s}^{2}}n{{d}^{1-5}}\]
B) \[(n+1)\,{{s}^{2}}n{{d}^{1-5}}\]
C) \[(n+1)\,{{s}^{2}}{{p}^{6}}(n-1)\,{{d}^{1-10}},n{{s}^{0-2}}\]
D) \[n{{s}^{2}}(n+1)\,{{d}^{1-10}}\]
Correct Answer: C
Solution :
Key Idea The outer electronic configuration of s-block, p-block, d-block and f-block are following s-block \[n{{s}^{1-2}}\] p-block \[n{{s}^{2}}\,n{{p}^{1-6}}\] d-block (transitional elements) \[(n-1)\,{{s}^{2}}(n-1)\,{{p}^{6}}\,(n-1)\,{{d}^{1-10}}n{{s}^{1-2}}\] but in case of Pd the electronic configuration of outermost shell is \[n{{s}^{0}}\]. \[f\]-block In the \[f\]-block elements the last electron is added to the third to the outermost energy level, ie, \[(n-2)f\]. Their three outermost shells are partially filled with electron. The outer electronic configuration of transitional elements is as \[(n-1)\,{{s}^{2}}{{p}^{6}}\,(n-1)\,{{d}^{1-10}}n{{s}^{0-2}}\]
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