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Chapter 6: The Periodic Table

Difficulty Level: At Grade Created by: CK-12

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Chapter Overview

The origin of the periodic table came about as Mendeleev and other scientists attempted to organize elements that displayed similarities in chemical reactivity. The modern periodic table is arranged by increasing atomic number and is organized into periods and groups. Electron configurations help to explain why the table has the exact form that it does. Periodic trends are systematic variations in properties of elements and include, atomic radius, ionization energy, ionic radius, and electronegativity.

Online Resources

See the following Web sites for appropriate activities:

Pacing the Lessons

Lesson Class Period(s) (60 min)
6.1 History of the Periodic Table 1
6.2 Electron Configuration and the Periodic Table 2
6.3 Periodic Trends 2-3

Chemistry Concepts

The table below matches each lesson from the FlexBook® student edition to the Chemistry Concepts.

FlexBook® Lesson Chemistry Concepts
6.1 History of the Periodic Table 6.1 – 6.7
6.2 Electron Configuration and the Periodic Table 6.8 – 6.14
6.3 Periodic Trends 6.15 – 6.21

Chapter Outline

Chapter Summary

Image Attributions


Difficulty Level:

At Grade

Date Created:

Jul 25, 2014

Last Modified:

May 07, 2015
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