Definition: The covalent radius refers to the size of atom that forms part of a covalent bond. Covalent radius is expressed in terms of picometers or angstroms. In theory, the sum of two covalent radii should equal the covalent bond length between two atoms, but in practice the length of the bond depends on the chemical environment.
Covalent Radius Definition
By Anne Marie Helmenstine, Ph.D., About.com Guide
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.