A) \[1{{s}^{2}},2{{s}^{2}},2{{p}^{6}}\]
B) \[[Ar]\,4{{s}^{1}},3{{d}^{10}}\]
C) \[[Ar]\,4{{s}^{1}}\]
D) \[1{{s}^{2}},\,2{{s}^{1}}\]
Correct Answer: C
Solution :
The electronic configuration of chlorine is\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}},3{{p}^{5}}\]. It is a halogen. It will form a compound of highest ionic character with alkali metals of comparable size. In all of the given electronic configurations, [Ar] \[4{{s}^{1}}\]is the configuration of an alkali metal of comparable size.
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