Give the electronic configurations of the following :
a. H $^{-}$ b. He $^{+}$ c.F $^{-}$ d. N $^{2 +}$

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Solution

The electronic configuration of the ions are as given below.
(A) H $^{-}$ = 1s $^{2}$
(B) He $^{+}$ = 1s $^{1}$
(C) $F^{-}$ = 1s $^{2}$ 2s $^{2}$ 2p $^{6}$
(D) N $^{2 +}$ = 1s $^{2}$ 2s $^{2}$ 2p $^{1}$

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