1.

Which one of the following configuration represents a noble gas                              [CPMT 1983, 89, 93; NCERT 1973; MP PMT 1989; DPMT 1984]

A.                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}\]       
B.                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}\]
C.                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}\]            
D.                 \[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]
Answer» D.                 \[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]


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