Environmental Chemistry
Evironmental chemistry.com: Periodic Table Argon
A very extensive sight on argon. Well organized and extremely helpful.
Florida-Spectrum Environmental Services
Florida Spectrum: Chemical Fact Sheet: Argon
A very thorough summary of basic information on argon, including sources, uses, isotopes and properties.
Encyclopedia of Earth
Encyclopedia of Earth: Argon
Information about the element, Argon, atomic number 18. Covers physical and atomic properties, how abundant it is on the Earth, its history, isotopes, uses, and health considerations.
Chem4kids
Chem4 Kids: Argon (Ar)
Chem4Kids looks at the 18th element in the periodic table, argon. Content focuses on argon's electrons, where you can find argon in nature and in the home, and how argon combines with other elements.
Royal Society of Chemistry
Chemical Society: Argon
This site, which is provided for by the Chemical Society, gives a small amount of basic information on argon, including its history and uses.
TED Talks
Ted: Ted Ed: Argon: Periodic Table of Videos
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about argon, an inert noble gas and element number 18. [1:26]
Other
Le Moyne College: The Discovery of Argon
A paper describing the steps and mis-steps involved in the discovery of argon.
Web Elements
Web Elements Periodic Table: Argon
Webelements offers a nicely designed page with a great deal of relevant information on argon. Very helpful.
Ducksters
Ducksters: Chemistry for Kids: Elements: Argon
Kids learn about the element argon and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics.