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Ch 3: The Periodic Table

About This Chapter

Watch video lessons and learn everything you've ever wanted to know about the periodic table. Take the quizzes that follow each lesson to make sure you understand all the components of the periodic table.

The Periodic Table - Chapter Summary and Learning Objectives

The periodic table is something most people are at least familiar with. While not everyone knows how to read the chart or interpret the data that it shows, most people do know that it shows the elements and their symbols. You wouldn't be here, though, if you were only interested in a simple definition. No problem! We have some quick and engaging video lessons that will teach you the essentials about the periodic table. You can also ask our instructors if you have any questions about the lessons. In this chapter, you'll study:

  • Why the periodic table is arranged as it is
  • What relationships are shown by diagonal proximity
  • How valence electrons and energy levels determine location on the table
  • What ionization energy is
  • How transition metals differ from main group metals

Video Objective
The Periodic Table: Properties of Groups and PeriodsLearn how the periodic table is arranged and why.
Valence Electrons and Energy Levels of Atoms of ElementsExamine the relationship between an element's location on the table and the number of valence electrons and energy levels in one of its atoms.
Atomic and Ionic Radii: Trends Among Groups and Periods of the Periodic TableExplain what atomic radii are and the trends in the table.
Ionization Energy: Trends Among Groups and Periods of the Periodic TableShow trends in ionization energy along the periodic table.
Electronegativity: Trends Among Groups and Periods of the Periodic TableExplore electronegativity and periodic trends.
The Diagonal Relationship, Metallic Character, and Boiling PointLook at various types of relationships, including boiling point trends and metallic properties.
Transition Metals vs. Main Group Elements: Properties and DifferencesDefine and examine main group elements and transition metals.

7 Lessons in Chapter 3: The Periodic Table
The Periodic Table: Properties of Groups and Periods

1. The Periodic Table: Properties of Groups and Periods

How is the periodic table like the map you used on your last road trip? In this lesson, you will be introduced to the periodic table, the road map of chemists. We will discuss how the elements are organized and how you can use this organization to identify some of their major physical properties.

Valence Electrons and Energy Levels of Atoms of Elements

2. Valence Electrons and Energy Levels of Atoms of Elements

The periodic table contains a wealth of information. This lesson will explain how to use it to quickly determine the most useful information about the most important electrons. We will be focusing our discussion on valence electrons and energy levels.

Atomic and Ionic Radii: Trends Among Groups and Periods of the Periodic Table

3. Atomic and Ionic Radii: Trends Among Groups and Periods of the Periodic Table

Atoms are VERY tiny. How do we measure their size? This lesson will explain how the size of an atom is measured and teach you how to predict the relative size of an atom based on where it is located on the periodic table.

Ionization Energy: Trends Among Groups and Periods of the Periodic Table

4. Ionization Energy: Trends Among Groups and Periods of the Periodic Table

Do you know someone who has undergone radiation as a form of cancer treatment? Have you ever thought about why X-rays have health risks? Watch the video to find out what these types of radiation are really doing to atoms, define ionization energy and identify ionization trends on the periodic table.

Electronegativity: Trends Among Groups and Periods of the Periodic Table

5. Electronegativity: Trends Among Groups and Periods of the Periodic Table

How is fluorine like a child that doesn't share his or her toys? Find out in this video on electronegativity where we will discuss group and periodic trends among the elements.

The Diagonal Relationship, Metallic Character, and Boiling Point

6. The Diagonal Relationship, Metallic Character, and Boiling Point

What may have once seemed like a bunch of random squares with letters in them is now shaping up to be one very organized chemistry reference. In this lesson you will discover three other trends that are found on the periodic table: the diagonal relationship, trends in metallic character, and trends in boiling point.

Transition Metals vs. Main Group Elements: Properties and Differences

7. Transition Metals vs. Main Group Elements: Properties and Differences

Which is better: to be steadfast and consistent or to be a colorful chameleon? This lesson compares and contrasts the main group elements and the transition metals. Then make your own decision!

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