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Bond Strength

Bond Strength. Bond length (the distance between the nuclei of atoms in a covalent bond) decreases with the addition of more shared pairs = stronger bond Recall: What is “ionization energy”? Similarly, energy is required to break a bond between atoms in a molecule: bond dissociation energy .

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Bond Strength

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  1. Bond Strength • Bond length (the distance between the nuclei of atoms in a covalent bond) decreases with the addition of more shared pairs = stronger bond • Recall: What is “ionization energy”? • Similarly, energy is required to break a bond between atoms in a molecule: bond dissociation energy.

  2. Bond Strength (continued) • Which molecule do you think would have the most bond energy: F2, N2, or O2? • Why? • Bond dissociation energies: • F2 = 159 kJ/mol • O2 = 498 kJ/mol • N2 = 945 kJ/mol

  3. Assignments  • Practice Problems, p.244: 1-5 • Study Guide for Content Mastery workbook: p.49 (omit 4 and 5) • Complete worksheets for review of naming compounds and writing formula units.

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