Vision Learning
Visionlearning: Chemistry: The Nature of the Chemical Bond
This site talks about ionic, polar covalent, and non-polar covalent bonding.
University of Southern California
Atomic Bonds
This slide show on atomic bonds contains several slides on electron affinity. Other topics include covalent, Sigma and Pi bonds, and atomic bonding in solids.
Ohio State University
Ohio State University: Electronegativity & Bond Polarity
Excellent graphics help this page explain the relationship between electronegativity and bond polarity.
Michael Blaber, PhD
Fsu: Basic Concepts of Chemical Bonding: Polarity and Electronegativity
Florida State University provides an explanation of electronegativity of elements and its affect on bond type.
CK-12 Foundation
Ck 12: Chemistry: Bond Polarity
[Free Registration/Login may be required to access all resource tools.] Covers polarity and covalent bonds.
Other
Personal Site: Covalent Bonding Single Bonds
This site is a personal site that gives "a simple view of covalent bonding" including explanations, diagrams, and examples.
Frostburg State University
General Chemistry: Why Oh, Nh, and Fh Bonds Are Polar
Frostburg State University provides a brief explanation to the question of why small hydrogen molecules, such as OH, NH, and FH, are very polar.
Other
University of Texas Dallas: Electron Appetites
The first section of this lecture on polarity and electronegativity discusses what polar covalent bonds are by using carbon dioxide as an example.