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Chemistry 120

Chapter 13: Structure and Shape. Chemistry 120. Outline Types of Bonds Ionic Metallic Covalent Electronegativity Bond Polarity Bonding Lewis Electron-Dot Structures VSEPR Theory Molecule Polarity . Chapter 12: Chemical Bonding. Gilbert N. Lewis. p356. Linus Pauling . p358.

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Chemistry 120

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  1. Chapter 13: Structure and Shape Chemistry 120 • Outline • Types of Bonds • Ionic • Metallic • Covalent • Electronegativity • Bond Polarity • Bonding • Lewis Electron-Dot Structures • VSEPR Theory • Molecule Polarity Chapter 12: Chemical Bonding

  2. Gilbert N. Lewis p356

  3. Linus Pauling p358

  4. What are the trends for electronegativity? Figure 12-11 p359

  5. Example – Electronegativity • Rank the following in order of increasing electronegativity: F, Ga, K, Rb, and V. • F < Ga < K < Rb < V • Rb < K < V < Ga < F • V < Rb < Ga < K < F • F < Ga < Rb < V < K • Rb < F < K < V < Ga

  6. How do atoms bond?

  7. How do bonds differ?

  8. What does a formula unit look like?

  9. What does the bonding in H2 look like? + 1s1 1s1

  10. How does Cl2 bond? + [Ne]3s23p5 [Ne]3s23p5

  11. What orbital(s) does Cl2 use to bond? Cl:[Ne]3s23p5

  12. How are electrons shared in Cl2?

  13. How does an electric field affect a polar molecule? Figure 13-9 p392

  14. How are electrons shared in HF?

  15. Example – Covalent Bonding • What is the Lewis structure for formaldehyde, CH2O?

  16. How are these structures different?

  17. Table 13-1 p380

  18. What are the basic shapes around a central atom? Figure 13-1 p381

  19. Figure 13-5 p384

  20. Example – Covalent Bonding • What is the Lewis structure for formaldehyde, CH2O?

  21. What is the shape when 2 atoms are attached to the central atom?

  22. What is the shape when 3 atoms are attached to the central atom?

  23. What is the shape when 4 atoms are attached to the central atom?

  24. What is the shape when 3 atoms + lone pair are attached to the central atom?

  25. What is the shape when 2 atoms + 2 lone pairs are attached to the central atom?

  26. Table 13-2, p. 377

  27. Example – VSEPR Theory • What is the molecular geometry for hydrogen sulfide? • tetrahedral • trigonal planar • trigonal pyramidal • bent • linear

  28. Example – VSEPR Theory • What is the bond angle for the thiocyanate ion, SCN-? • 109.5° • 107° • 180° • 104.5° • 120°

  29. Is CO2 a polar or nonpolar molecule?

  30. Figure 13-10 p392

  31. Can a nonpolar molecule have polar bonds?

  32. What is the direction of the net dipole?

  33. Figure 13-11 p393

  34. How are coordinate covalent bonds different from other covalent bonds?

  35. p. 397

  36. p. 397

  37. What is one way that a metal obtains an octet?

  38. What is one way that a nonmetal obtains an octet?

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