By Anne Marie Helmenstine, Ph.D., About.com Guide
Air was considered to be one of the four classical elements in alchemy, together with earth, water, and fire. The symbol was used to denote all that was wet, hot, or sanguine in character.
Chemical Element Photo GalleryScience Lab Safety SignsCrystal Photo Gallery
Alphabetical List of ElementsElement Names Spelling QuizElements in the Human Body
©2009 About.com, a part of The New York Times Company.
All rights reserved.