A) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{3}}\]
B) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{4}}\]
C) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{3}}\]
D) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{2}}\]
Correct Answer: C
Solution :
General valence shell electronic configuration of group 15 elements is \[n{{s}^{2}}n{{p}^{3}}\]and for third period \[n=3.\]Thus, with electronic configuration\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{3}},\] the element is phosphorus.
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