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Chemical Bonding
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Chemical Bonding Presentation Transcript

  • 1. Chemical Bonding Mrs. Kuzara Chemistry 2009-2009
  • 2. Chemical Bonding Types of Bonding
  • 3. Chemical Bonding Metallic Bonding & Properties empty d-orbitals high luster   delocalized electrons malleability   ‘sea of electrons’ ductility   attraction between  atoms & sea of electrons
  • 4. Chemical Bonding Ionic vs. Covalent
  • 5. Chemical Bonding Ionic vs. Covalent
  • 6. Chemical Bonding Ionic vs. Covalent
  • 7. Chemical Bonding Ionic Bonding transfer of electrons  orderly crystal lattice  very strong bond  hard but brittle solids  conduct electricity in  molten or dissolved state formula unit 
  • 8. Chemical Bonding Covalent Bonding sharing of valence electrons  molecular formula  polar covalent & nonpolar covalent 
  • 9. Chemical Bonding Intermolecular Forces Molecular Polarity & Dipole-dipole   the attraction between polar molecules depends on electronegativities  polar molecules have a positive pole and  a negative pole
  • 10. Chemical Bonding Intermolecular Forces Molecular Polarity & Dipole-dipole   Molecular polarity depends on bond orientation
  • 11. Chemical Bonding Nonpolar Covalent
  • 12. Chemical Bonding Intermolecular Forces London Dispersion   weakest!  occurs between all atoms & molecules  …even noble gases!
  • 13. Chemical Bonding Polar Covalent
  • 14. Chemical Bonding Hydrogen Bonding very strong dipole-  dipole force HF, H2O, NH3  large eN- difference  very high boiling  points