Bond Strength

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 ?

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