CK-12 Foundation
Ck 12: Periodic Trends
[Free Registration/Login may be required to access all resource tools.] In the following online tutorail students will use the Periodic Table to identify and explain periodic trends, including atomic and ionic radii, electronegativity,...
Khan Academy
Khan Academy: Counting Valence Electrons
Identify the number of valence electrons of given elements.
Khan Academy
Khan Academy: Counting Valence Electrons
A short assessment to see if you understand valence electrons in specific elements.
TeachEngineering
Teach Engineering: Keep It Moving! From Electrons to Electric Motors
Students act as engineers to apply what they know about how circuits work in electrical/motorized devices to design their own battery-operated model motor vehicles with specific paramaters. They calculate the work done by the vehicles...
Vision Learning
Visionlearning: Chemistry: The Nature of the Chemical Bond
This site talks about ionic, polar covalent, and non-polar covalent bonding.
University of California
Organic Chemistry Page: A Brief Tutorial on Drawing Lewis Dot Structures
An excellent lesson on writing Lewis structures. Examples shown include ammonium ion, carbon dioxide and the carbonate ion.
Other
Chemical Bonds: Formal Charges
A slide presentation with several slides dedicated to the topic of formal charges. Formal charges are explained, and examples are given. A practice example is provided.
CK-12 Foundation
Ck 12: Electron Configuration and the Periodic Table
[Free Registration/Login may be required to access all resource tools.] In this learning module, students will explore how the form of the periodic table is related to electron configurations, which in turn influences chemical reactivity.
CK-12 Foundation
Ck 12: Ions
[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will be able to determine the number of valence electrons for any element and draw an electron dot diagram for any atom....
Science Education Resource Center at Carleton College
Serc: Loopy Lewis Dot Diagrams
Students will use colored fruit loops to organize valence electrons to develop and master the basics of Lewis Dot diagrams. They will develop processing and critical thinking skills and also master a model of bonding.
Science Education Resource Center at Carleton College
Serc: Valence Electrons and Trends in the Periodic Table
This instructor led activity will produce a partially filled periodic table that contains electron-dot models for the first twenty elements in the appropriate boxes. It will be used as a visual tool for students to connect concepts such...
Science Education Resource Center at Carleton College
Serc: Modeling Valence Electrons
In this activity, students use a map of electron configuration and bingo chips to configure electrons for elements that are given on a problem card. Students will see patterns of elements and their valence electrons in relation to the...
Simon Fraser University
Chem1 Virtual Textbook: The Valence Bond Model
The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section deals with hybrid orbitals and specifically the valence bond model.
Towson University
Towson University: Drawing Lewis Structures
Brief rules for writing Lewis structures for simple compounds. Some examples are included.
State University of New York
State University of New York: Drawing Lewis Structures
This simulation is an interaction with drawing Lewis structures.
Clackamas Community College
Clackamas Community College:valence Electrons
Introduction to the concept of valence electrons that relates the idea to periodic properties and electron configurations.
Sophia Learning
Sophia: Interpreting Electron Configurations: Lesson 3
This lesson will demonstrate how to identify an element and state the number of valence electrons given its electron configuration. It is 3 of 3 in the series titled "Interpreting Electron Configurations."
Sophia Learning
Sophia: Octet Rule: Lesson 4
This lesson will define the Octet Rule and how this effects an atom's stability. It is 4 of 5 in the series titled "Octet Rule."
Sophia Learning
Sophia: Valence Electrons: Lesson 6
This lesson will describe the importance of valence electrons in the process of chemical bonding. It is 6 of 7 in the series titled "Valence Electrons."
Sophia Learning
Sophia: Lewis Dot Diagrams of Elements: Lesson 4
This lesson will demonstrate how to draw a Lewis Dot diagram for elements. It is 4 of 4 in the series titled "Lewis Dot Diagrams of Elements."
American Chemical Society
Middle School Chemistry: The Periodic Table & Energy Level Models
Find out how energy level models are represented on the Periodic Table of Elements.
CK-12 Foundation
Ck 12: Chemistry: Periodic Trends: Electronegativity
[Free Registration/Login may be required to access all resource tools.] Defines electronegativity and explains trends in electronegativity.
CK-12 Foundation
Ck 12: Chemistry: Valence Electrons
[Free Registration/Login may be required to access all resource tools.] Covers valence shell electrons and inner shell electrons.
Chem Tutor
Chem Tutor: Chemistry: Lewis Structures of the Elements
This colorful page goes over the proper techniques for writing Lewis structures for elements. This is a great place to begin learning how to write Lewis structures. When you are ready for a more advanced lesson, follow the link to learn...