A) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{4}}\,\,\]
B) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\,\,\]
C) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\]
D) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}\]
Correct Answer: C
Solution :
Because for removing second electron, it has to be taken out from stable configuration that needs a large amount of energy.
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