Question

locate these elements in the periodic table and then draw a lewis dot symbol that represents a number of valence electrons for an atolm of each

12. Unde he Love these elements in the periodic table and then draw a Lewis dat symbol r of valence electrons for an atom of each b) Bir d) S c) Na e) N 10. Give the electron configurations of these ions, and indicate which ones are isoelectronic a) Ca2+ b) K+ c) O2- 11. What is the electron configuration for a) a bromine atom? a bromide ion?

Answer 1

I & located in period 2 and group 16. (6 br located in group 17 of periodic table. @ Na = located in the first group. (2 s located in column or group 16 ② N located in period 2 and group 15. Lewis dot symbol to represent the number of nalence electron: - @ Ö (a valence electrows) 6 Bor ( 5 ralence electrom) @ Na ( 1 ralence electron) ( :S: (6 valence electrons) 0 N. (3 valence electrons)

Date: I Electronic configuration & - @ cat 15² 252 266 35² 3p6 6 kr 15² 252 2p 6 35² 3p6 © OP=> 15? RS? epa SWAIN same num D I There are same number of electrons in coat and kt ion. Hence, they are isockctronic (1) Electronic configuration - (1) Br - 15? 25? 2p € 35? 3p6 3 do 45² 4p5 (2) Br = 15² 25² 2p% 35² 3p% 3 do 4s²4p6