A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Definition: state of matter consisting of particles that have neither a defined volume nor defined shape.
Examples: air, chlorine at room temperature and pressure, ozone
Gas Definition
Chemistry Glossary Definition of Gas
By Anne Marie Helmenstine, Ph.D., About.com Guide
Vial of chlorine gas.
Ben Mills
Return to the Chemistry Glossary Index
Explore Chemistry
Must Reads
About.com Special Features
A Smarter Future
Tips that will help finance your education, excel in the classroom, and advance your career. More >
How to Ace the GRE
Being well prepared is the first step; here are more essential suggestions. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.