A) \[1{{s}^{2}},\text{ }2{{s}^{2}}\text{ }2{{p}^{5}}\]
B) \[1{{s}^{2}},\text{ }2{{s}^{2}}\text{ }2{{p}^{3}}\]
C) \[1{{s}^{2}},2{{s}^{2}}\text{ }2{{p}^{5}}\text{ }3{{s}^{1}}\]
D) \[I{{s}^{2}},\text{ }2{{s}^{2}}\]
Correct Answer: D
Solution :
Fully filled electronic configuration is stable. Removing electron from it is very difficult.
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