After this lesson, you should be able to:

• Explain the concepts electronegativity, polar and non-polar bond, dipole
• Show polarity of bonds using partial charges
• Compare polarities of bonds using a table of electronegativities
• Distinguish types of bonds in terms of difference in electronegativity (\(\Delta\)EN)
• Predict polarity of a molecule
• Define bond energy and bond length
• Explain the relationship between bond energy and bond length
• Explain the relationship between bond strength and

• bond length
• size of atoms
• number of bonds between atoms