(i) write the electronic configurations of the following ions : (a) H^(+) (b) Na^(+) (c) O^(2-) (d) F^(-) ltbr. (ii) What are the atomic number of elements whose outermost electrons are represented by (a) 3s^(1) (b) 2p^(3) and (c) 3 d^(6) ?

(i) write the electronic configurations of the following ions : (a) H^

1.	(i) write the electronic configurations of the following ions : (a) H^(+) (b) Na^(+) (c) O^(2-) (d) F^(-) ltbr. (ii) What are the atomic number of elements whose outermost electrons are represented by (a) 3s^(1) (b) 2p^(3) and (c) 3 d^(6) ?
Answer» Solution :(i) (a) `._(1)H=1 s^(1) :. H^(+)=1 s^(0)""`(b) `._(11)Na=1 s^(2) 2s^(2) 2p^(6) 3s^(1) :. Na^(+)=1s^(2) 2s^(2) 2p^(6)` (C) `._(8)O=1 s^(2) 2s^(2) 2p^(4) :. O^(2-)=1 s^(2) 2s^(2) 2p^(6)""`(d) `._(9)F=1 s^(2) 2s^(2) 2p^(5) :. F^(-) =1 s^(2) 2s^(2) 2p^(6)` (ii) (a) `1s^(2) 2s^(2) 2p^(6) 3s^(1) (Z=11)""`(b) `1s^(2) 2s^(2) 2p^(3) (Z=7)` (c) `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4S^(2) 3d^(6) (Z=26)`.