Workshop CHE 166
Answers for
Problem Set #9
1. 0; diamagnetic
2. 2n2
3. d
4. Sb
5. 6; paramagnetic
6. 1s22s22p63s23p64s23d104p65s24d105p1; [Kr]5s24d105p1
7. 1s22s22p63s23p3; [Ne]3s23p3
8. [n, l, ml, ms]: 4, 1, (- 1,0,+1), ± 1/2 {Choice for ml and ms due to degenercy of levels}
9. f orbitals
10. a
11. 3; paramagnetic
12. 7
13. 5A
14. Br
15. +2
16. F
17. I-
18. alkaline earth metals
19. 1s22s22p63s03p0; 1s22s22p63s0; 1s22s22p63s23p64s23d103p6; 1s22s22p63s23p6; 1s22s22p63s23p64s03d10
20. polar covalent bond
21. NO2-
22. 1s22s2p3, [He]2s2p3 ; 5 valence electrons; 1s22s2p6, [He]2s2p6; 8 valence electrons
23. (a) 14 e- ; 1 C- C bond with 6 C- H bonds (tetrahedral about each carbon, sp3); (b) 12 e- ; 1 C=C with 4 C- H bonds (trigonal planar about each carbon, sp2) ; (c) 16 e- ; 2 C=O bonds, each O has 2 non-bonded pairs (linear, sp) ; (d) 48 e- ; 6 S- F bonds, each F has 3 non-bonded pairs (octahedral, d2sp3) ; (e) 40 e- ; 5 Sb- Cl bonds, each Cl has 3 non-bonded pairs (trigonal bipyramidal, dsp3) ; (f) 22 e- ; 2 Xe- F bonds, Xe and each F has 3 non-bonded pairs (linear, dsp3).
24. - 195 kJ
25. - 52 kJ