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Ch 2: Atoms & Molecules

About This Chapter

Use the educational videos and assessment quizzes in this chapter to teach your middle school student about atoms and molecules. The lessons also include topics in atomic numbers, electron configurations and Avogadro's number.

Atoms & Molecules - Chapter Summary

The lessons in this chapter are designed to help your middle school student understand the basic building blocks of matter. Students can also get an introduction to molecules, atomic theories and the properties of matter through these fun videos and multiple-choice quizzes.

Chapter Lessons and Objectives

Lesson Objective
The Atom Instructors explain the subatomic particles that make up an atom.
Atomic Number and Mass Number Students learn how to determine atomic and mass numbers.
Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan This lesson discusses the discoveries and theories of these three scientists.
Avogadro's Number: Using the Mole to Count Atoms Instructors demonstrate the formula for counting atoms.
Electron Configurations in Atomic Energy Levels Students learn how to write and use the electron configuration of an atom.
What is a Molecule? - Structure, Lesson & Quiz In this lesson, instructors present the parts of a molecule.
Matter: Physical and Chemical Properties Students see examples of the different properties of matter.

7 Lessons in Chapter 2: Atoms & Molecules
Test your knowledge with a 30-question chapter practice test
The Atom

1. The Atom

Tune into this lesson to find out what matters about matter. What exactly is an atom? And, how do the atoms that make up the elements in the periodic table differ from one another?

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.

Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan

3. Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan

Imagine firing a bullet at a piece of tissue paper and having it bounce back at you! You would probably be just as surprised as Rutherford when he discovered the nucleus. In this lesson, we are going to travel back in time and discuss some of the major discoveries in the history of the atom.

Avogadro's Number: Using the Mole to Count Atoms

4. Avogadro's Number: Using the Mole to Count Atoms

How do we move from the atomic world to the regular world? Because atoms are so tiny, how can we count and measure them? And what do chemists celebrate at 6:02 AM on October 23rd each year? In this lesson, you will be learning how Avogadro's number and the mole can answer these questions.

Electron Configurations in Atomic Energy Levels

5. Electron Configurations in Atomic Energy Levels

This lesson will explain what the electrons are doing inside the atom. Tune in to find out how we specify where they are located and how this location description will help us predict an element's properties.

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.

Matter: Physical and Chemical Properties

7. Matter: Physical and Chemical Properties

How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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