Lewis Structures (22 min)


This tutorial provides a brief overview of Lewis structures for organic chemistry. An approach is presented for quickly identifying formal charges and drawing organic compounds. (Runtime = 21:31)

Student Learning Outcomes
After viewing this tutorial and practicing problems from this website and your textbook, you should be able to:
• Draw a Lewis structure for any given molecular formula.
• Determine the formal charge for every atom in a Lewis structure.
• Determine the number of nonbonded electrons for any given Lewis structure.


Practice Problems
Here are some problems to get you started. You should first try each on a piece of paper. Then, place your cursor over the graphic and click on right arrow that appears to see the answer. The right and left arrows allow you to move back and forth between problems. Please note that these are not the only types of problems/questions that exist on this topic. Refer to your textbook and any problems your instructor provides you for more practice with this subject.


© Thomas Poon 1999