Module 2 Intro

Module 2—Chemical Compounds

Module Introduction

In Module 2 you will learn more about the bonding of chemical compounds. You may recall that chemical bonding involves attractions between atoms. As you will see in this lesson, forces associated with bonding can be between atoms within a molecule and between molecules. The substances that we use can be considered as chemical technologies—tools to support our lives. In this module you will learn how the physical and chemical properties of many common substances are determined by bonding relationships.

The major concepts developed in this module include

• bonding theory and Lewis formulas

• molecular shapes and VSEPR theory

• molecular polarity

• intermolecular forces

Think about the following questions as you complete this module:

• What are the roles of modelling, evidence, and theory in explaining and understanding the structure, bonding, and properties of molecular compounds?
  
  

• Why do substances have different melting and boiling points?
  
  

• How can principles of bonding in matter be used to develop unique materials?

In previous science courses you completed lab activities, submitted reports, and used tables and graphs. These skills will be required in this module. If you require a refresher on any of these areas, review the following pages in your textbook:

• “Investigation Report Outline” and “Sample Investigation Report,” pages 790 to 795

• “Laboratory Equipment,” pages 797 to 801

• “Diagnostic Tests,” page 805

• “Laboratory Safety,” “Safety Symbols and Information,” and “Waste Disposal,” pages 807 to 810

• “Tables and Graphs,” pages 815 to 816