Lists the exceptions to the octet rule and provides a discussion and diagrams explaining each one. Includes clear diagrams illustrating this concept.

Test your knowledge of common atoms and their corresponding electron configurations. In this interactive exercise, you will find out how much you really know about the orbitals of electrons.

The following simulation provides an interaction with electron configurations.

The Pauli Exclusion Principle shows how electrons fill atomic orbitals. Includes biographical information on Wolfgang Pauli.

Each electron has a set of quantum numbers that specify it's location, orbital, and energy in a unique manner.

At this University of Texas site, atomic orbital occupancy, quantum numbers, the Aufbau Principle, and periodic trends are described in detail.

[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will calculate the wavelength, frequency, and energy of light using Planck's constant and the speed of light. They will...

Here you can find lots of great information about helium. Learn about its electrons, where it exists in nature, and about the element itself!

Here at Chem4Kids you can find some great information about the 4th element in the periodic table, "beryllium." Content focuses on beryllium's electrons, where you can find beryllium in nature, and how beryllium combines with other...

Here at Chem4Kids.com you can find some great information about the 5th element in the periodic table, "boron." Content focuses on boron's electrons, where you can find boron in nature and in the home, and how boron combines with other...

Analyze the electron configuration of the of the first twelve elements on the Periodic Table.

A description of quantum theory, the Bohr model of the atom, the quantum mechanical atom, the Scrodinger equation, and quantum numbers.

Monterey Peninsula College faculty page simply shows a 3-D image of a Pi bonding orbital. Requires the CHIME plug-in

At this site from Purdue University, Electron Configurations, the Aufbau Principle, Degenerate Orbitals, and Hund's Rule are detailed. Includes learning exercises and answers.

[Free Registration/Login may be required to access all resource tools.] Covers energy levels of atoms, their relation to orbitals, and the significance of electrons at different energy levels.

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.

Explains what the effective nuclear charge is and how electrons can create a shield between a nucleus and an outer electron. Presents exercises for comparing orbital sizes with effective nuclear charges. Requires Java.

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

The Pauli Exclusion Principle requires that all electrons in an atom have unique energy levels.

Here at Chem4Kids you can find some great information about the third element in the periodic table, lithium. Content focuses on lithium's electrons, where you can find lithium in nature, and how it bonds with other elements (or with...

This section from the online textbook "An Introduction to Chemistry" provides helpful hints to writing abbreviated electron configurations. Also learn how to look up the atom's outer shell electrons.

This section of the online textbook "An Introduction to Chemistry", shows the unexpected electron configurations of six elements. A chart compares their predicted configurations with their actual configurations. Also find links to...

This slide presentation contains a description of the octet rule, as well as many related topics.

The modern atomic theory chapter from "An Introduction to Chemistry", describes electrons, electron orbitals, and how to draw orbital diagrams. Many pictures and examples help to explain the information. Also find a detailed chapter...