Ninth graders examine the Periodic Table. In this element lesson, 9th graders observe the chemical reactivity of elements. They graph the properties and discuss the trend in the group and period of elements. The students use math to...

In this elements worksheet, students review the periodic table and how the elements are organized in the periodic table. This worksheet has 5 short answer and 4 fill in the blank questions.

Students demonstrate their understanding of a chemical process.  In this exploratory lesson students create a clay animation that shows how a specific type of chemical bond. 

This lesson will explain how to identify the number of valence electrons an element has based on its position on the periodic table. It is 3 of 3 in the series titled "Identifying Valence Electrons."

[Free Registration/Login may be required to access all resource tools.] Covers valence shell electrons and inner shell electrons.

[Free Registration/Login Required] In this interactive you must place all of the students in their seats from back to front and see if you can figure out what element they would be if the rows of bus seats were the indicated electron...

An excellent tutorial that examines VSEPR and pairs of valence electrons. The valence shell electron pair repulsion concept is explored using animated models. Includes a VSEPR calculator. Use the toolbar on the left to navigate through...

Valence electrons are defined in terms of electron configuration.

Detailed explanation of Valence Shell Electron Pair Repulsion (VSEPR) Theory with examples and questions for the reader to check comprehension. Also includes step-by-step instructions for correctly building molecules using VSEPR Theory....

The periodic table was laid out using valences or the electrons in the outermost shell.

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses repulsion of electron pairs. Diagrams and charts of the repulsion are also provided.

Presents examples of molecules that do not match the expected bond angles in the Valence-Shell Electron-Pair Repulsion Model. Requires Java.

An overview of chemical bonding and how valence electrons play a major role in these processes.

Presents exercises where students can check their understanding of the Valence-Shell Electron-Pair Repulsion Model by predicting what a molecular shape will be. Requires Java.

Explains the principles of the Valence-Shell Electron-Pair Repulsion Model, and gives examples of the geometry. Requires Java.

Why does the shape of a molecule matter? Learn about how the shape of the molecule not only determines the molecule's properties but also whether it reacts or not. This tutorial reviews of VSEPR and molecular geometry.

A quiz on chemical bonding and valence electrons.

Explanation of Noble gases and of how atoms attempt to fill their outermost valence shells for stability.

This site talks about ionic, polar covalent, and non-polar covalent bonding.

Good site includes the basics of arrangement, hybridization, and gemetry.

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."

An advanced explanation of the valence shell electron pair repulsion (VSEPR) theory describes specific molecular models involving digonal, trigonal, tetrahedral, and octahedral coordination, as well as central atoms with five bonds....

[Free Registration/Login may be required to access all resource tools.] The following online tutorial explains the basis of VSEPR theory. It helps students predict the shapes of molecules and polyatomic ions using VSEPR theory and it...

[Free Registration/Login may be required to access all resource tools.] In this interactive learning module, students will learn a technique to predict molecular geometry based on a molecule's Lewis electron dot structure.