Question

1s 2s 2p 3s*3p 4s 3d"4p 5s4d? 17. Which ion with a +1 charge has the electron configuration 1s 2s 2p 3s 3p 3d 4s 4p? Which ion with a -2 charge has this configuration? 18. Which of the following atoms contains only three valence electrons: Li, B, N, F, Ne? 19. Circle the atoms with two unpaired electrons. (a) Mg (b) Si (c) S 20. Place the following in order of increasing atomic radius. As 0 Br A) As < Br< 0 C) Br < As < 0 E) < Br< As B) O < As < Br D) As <0 < Br 21. Place the following in order of increasing radius. Ca2+ S2 Cl A) Ca2+ < Cl< S2- C) S2 < Cl< Ca2 B) CI < Ca2+ < S2 D) Ca2* <S2 < Cl 22. Place the following in order of decreasing radius. Te2 F 02 A) F > 02 > Te2 C) Te2 > 02 > F E) 02 > F > Te2 BF > Te2 > 02 D) Te2 > F > 02

Answer 1

Answer. 17. Which ion with at charge has the electronic configuration 1s², 25², 2 po 3 do 45² 496. Answer which ion with a 2 has his configuration - at - pbt à ² = sez- 18. Which of the following atom only three valence electron. - Boron (B) has three valence eletron Boron atomic No: 5 electronic configuration = 15, 25 ap' ig I circle at atom with two unpaired electron. There are todo atom consist of unpaired electron si silicon) two si= 15², 25², aps, 35², 3p2 in order 20. Place the following atomic radius. - As, o Br of increasin PS E OL Br LAS

21. order of Place the increasing o cart following in radius. Sat, ci Answer A Ca 2+ <cil S²- following F- 02- of 22. Place the - Tez-, Answers decrease radius. c] Te 2- you f