Question

8. Write the electron configuration for each of the following atoms and for the simple ion that the element most commonly forms. In each case, indicate which noble gas has the same electron configuration as the ion. a. sodium, Z=11 b. iodine, Z= 53 c. calcium, Z=20 d. nitrogen, Z-7 e. fluorine, Z= 9

Answer 1

8. Ans' @ Sodium, 2=11. The electronie configuration No = 15²252pt 3st is The simple now that sodium most commonly forms is Nat One elutrow is removed from the outwmost shell of Na. So, elutronic configuration of Nat is Nat= 15 25 28635 Nat has the same electronic configuration as that of Neon. (2=10) Sinco Nat has 10 eletrons - Todine, 2=53. The elutronie configuration of rodine is

Iso= [kv] 55² 4 do 5ps = [kr] ad 55 5ps The simplest on that rodine most commonly forms is godine gain one elutron and allain the electronic configuration of Xenon (2=54). @ Calcium, z=20 The electronie configuration is Ca o = 15 25 206 35² 3p645 The simplest on that calciuen most commonly fourns is Two elutrons are seenoved from the outer as sectal Ca 2+

and has the same electronic configuration Angon (3:18) with ② Nitrogen, 2 7 . The lutronic configuration is N = 15 25 2p3 The simplest now that nitrogen most commonly forms | Vo Nº" . Nitrogen gain 3 lutrons and attain the electronic configuration of Neon (2010). @ fluorine 29 The clutronic configuration is fg = 15 25 205 The simplest now that fluorine most commonle forms is f Fluorine gain one elutrow and attain the eleponie configuration of Neon (2210).