A) \[{{N}^{3-}},L{{i}^{+}},M{{g}^{2+}}\]and\[{{O}^{2-}}\]
B) \[L{{i}^{+}},N{{a}^{+}},{{O}^{2-}}\]and\[{{F}^{-}}\]
C) \[{{F}^{-}},L{{i}^{+}},N{{a}^{+}}\]and\[M{{g}^{2+}}\]
D) \[{{N}^{3-}},{{O}^{2-}},{{F}^{-}}\]and\[N{{a}^{+}}\]
Correct Answer: D
Solution :
\[{{N}^{-3}}\to 1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[L{{i}^{+}}\to 1{{s}^{2}}\] \[M{{g}^{+2}}\to 1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[{{O}^{2}}\to 1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[{{F}^{-}}\to 1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[N{{a}^{+}}\to 1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[{{N}^{-3}},{{O}^{-2}},{{F}^{-}}\] and \[N{{a}^{+}}\]are isoelectronic
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