CHE 1220 Lecture Notes - Lecture 6: Valence Electron, Electron Configuration, Lone Pair

• School: St. John's University
• Department: Chemistry
• Course: CHE 1220
• Professor: Eranda Maligaspe

Document Summary

Lewis structures are one of the most important topics in general chemistry as well as future. Molecules exist because they are more stable than separated atoms. By more stable, we mean that they have lower energy in the same way that a skier at the bottom of a hill has less potential energy or is more stable than one at the top. The lewis structure represents the most stable arrangement of atoms and electrons. It describes the number of bonds formed between pairs of atoms as well as the number of electrons that exist as nonbonding or lone pairs. A correct lewis structures allows you to predict many parameters such as polarity, geometry, bond length, and bond strength. In this module you will learn how to make lewis structures, and determine the best possible structure if multiple choices are available. Master the use of electronegativity to predict bond characteristics.