Ch 6: Atoms & Molecules in Chemistry

About This Chapter

With this overview of atoms and molecules in chemistry, improve your understanding of Lewis dot structures, covalent bonding, and molecular formulas. Concise but filled with important information, the lessons are designed to help you with homework or test preparation.

Atoms & Molecules in Chemistry - Chapter Summary

While studying these lessons, you can heighten your understanding of atoms and molecules in chemistry. One of the topics covered is predicting formation, charge, and formulas of ions. This chapter can also help you understand the relationship between energy levels and the light emission spectra of individual atoms. After reviewing the lessons, you should be ready to do the following:

  • Use an equation to determine the energy level of an atom
  • Discuss mass number and atomic number
  • Explain the use of the octet rule to form ions
  • Draw the Lewis diagram of an atom and Lewis dot structures
  • Recall the structure of a molecule
  • Define covalent bonding and electron shells
  • Explain how atoms and ions are used to determine molecular formulas

With these helpful lessons, you can easily grasp the concepts covered, and key words are highlighted in bold for quick reference. A brief quiz is available to test your knowledge of the concepts covered, and the quizzes can be printed for use as a study tool. Although information-packed, it only takes about 5 minutes to complete each lesson.

8 Lessons in Chapter 6: Atoms & Molecules in Chemistry
Test your knowledge with a 30-question chapter practice test
What is an Energy Level of an Atom?  - Definition & Equation

1. What is an Energy Level of an Atom? - Definition & Equation

In this lesson, you will learn about the possible energy states that an electron can have in an atom. You will also understand how these energy levels give rise to the light emission spectra of individual atoms.

Atomic Number and Mass Number

2. Atomic Number and Mass Number

Atoms are the basic building blocks of everything around you. In order to really understand how atoms combine to form molecules, it's necessary to be familiar with their structure. In this lesson, we'll dissect atoms so we can see just what really goes into those little building blocks of matter.

Ions: Predicting Formation, Charge, and Formulas of Ions

3. Ions: Predicting Formation, Charge, and Formulas of Ions

Learn how ions are formed using the octet rule. Use the periodic table to predict the charge an atom will have when it becomes an ion. Learn whether an ion is a cation or anion and how to write the formula depending on what charge the ion has.

The Octet Rule and Lewis Structures of Atoms

4. The Octet Rule and Lewis Structures of Atoms

Learn the octet rule and how it applies to electron energy levels. Identify valence electrons and learn how to determine them by looking at the periodic table. Also, discover how they pertain to the octet rule. Learn how to draw the Lewis diagram of an atom, and understand how it provides clues to chemical bonding.

Lewis Dot Structures: Polyatomic Ions

5. Lewis Dot Structures: Polyatomic Ions

This lesson defines Lewis dot structures and explains how to draw them for molecules in step-by-step detail. We'll also explore polyatomic ions and how to draw Lewis dot structures for them.

What is a Molecule? - Structure & Models

6. What is a Molecule? - Structure & Models

Water is a molecule. Caffeine is a molecule. DNA is a (really big) molecule. Learn how molecules are constructed and modeled and explore the different types of models.

Covalent Bonding and Electron Shells: Definitions, Relationship & the Octet Rule

7. Covalent Bonding and Electron Shells: Definitions, Relationship & the Octet Rule

Learn about the different electron shells of atoms as well as the octet rule for valence electrons and how that applies to covalent bonding. Discover the definition of covalent bonding and the relationships between atoms.

Using Atoms and Ions to Determine Molecular Formulas

8. Using Atoms and Ions to Determine Molecular Formulas

In this lesson, you will learn how atoms and ions determine molecular formulas. You will understand how molecular formulas tell information about the type and quantity of atoms involved in a molecule. Lastly, we will discuss how to write a molecular formula for an ionic compound.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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