Students interpret the information given in the periodic table to describe the arrangement of electrons on the energy levels around an atom.

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.

Test your electron-configuration skills in this animated exercise. Practice writing the abbreviated configurations for some of the common elements on the periodic table.

Brief explanation from Frostburg State University of valence bond theory and an explanation of what chemical situation creates a valence bond between two atoms.

This lesson will point out the difference between electron pairs and unpaired electrons in an atom using orbital diagrams. It is 2 of 3 in the series titled "Paired and Unpaired Electrons."

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

Young scholars discover the concept that two atoms can attract and form a covalent bond.

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...

Short slide show provides basic information about drawing Lewis dot structures for covalent compounds. Starts with anatomy of the atom, and then shows the relationship between atomic particles and the Periodic Table of Elements. Offers...

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.

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

This lesson will demonstrate how to write the electron configurations for any element given its location on the periodic table. It is 3 of 3 in the series titled "Writing Electron Configurations."

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.

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

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

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

This slide presentation contains a few slides that will be useful for students learning to write Lewis structures. A discussion of multiple bonds is included, and clear examples are shown.

An excellent lesson on writing Lewis structures. Examples shown include ammonium ion, carbon dioxide and the carbonate ion.

This PowerPoint presentation features 33 slides that explain chemical bonding and molecular shape.

Slides 5 through 8 in this presentation from the McMaster University explain covalent bonding.

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

Find out how energy level models are represented on the Periodic Table of Elements.