valence-shell

valence electron

noun Chemistry.
an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom.

Origin:
1925–30

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To valence-shell
American Heritage
Science Dictionary
valence electron  
An electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature