Ozone, made of three bonded oxygen atoms, is found 15-30 km above Earth, has a strong smell, is blue, and blocks sunlight from hitting the surface of Earth. The 22nd lesson in a series of 36 specifically focuses on the important elements...

This site provides a nice description of the inert gases (noble gases). Content focuses on why they are so "happy," who they are, and their bonding abilities.

A listing of the noble gasses can be found here as well as images and links to additional information. This site is maintained by a high school chemistry teacher but is supplemented with information from the Los Alamos National...

Learn how noble gases were discovered, what their properties are, and their uses. Includes a chart listing the six noble gases and some details about them.

Read about the properties of the six noble gases - helium, neon, argon, krypton, xenon, and radon.

Provides the configuration for each of the six noble gases and explains how to write noble gas configurations. Also explains what pseudo-noble gas configuration is.

Provides information on the development of the periodic table under the following sections: In the Beginning, Law of Triads, First Attempts At Designing a Periodic Table, Law of Octaves, Who Is the Father of the Periodic Table?,...

This site provides a set of data tables summarizing the physical and chemical properties and data on radon.

Explains how a plasma ball works. It is based on a lamp invented by Nikola Tesla. One needs to be aware of health hazards associated with them. The article includes some amusing tricks that can be done safely with a plasma ball.

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

Fun and interesting information about Helium, the 2nd lightest gas after Hydrogen. Learn about its characteristics, uses, where it is found, and discovery.

Fun and interesting information about elements. Learn about the periodic table, how they are distinguished, and the different families of elements.