A) \[N{{a}^{+}}\]
B) \[A{{l}^{3+}}\]
C) \[{{O}^{2-}}\]
D) \[{{N}^{+}}\]
Correct Answer: D
Solution :
\[{{N}_{7}}=1{{s}^{2}}\,2{{s}^{2}}2{{p}^{3}}\] \[{{N}^{+}}=1{{s}^{2}}\,2{{s}^{2}}2{{p}^{2}}\] \[C=\,\,1{{s}^{2}}\,2{{s}^{2}}2{{p}^{2}}.\]
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