what are delocalized electrons

Question

what is the specific (can be one simple sentence) definition of "delocalized electrons?" my chemistry book does not have the definition, and the phrase is not in the index and I need to know what it is thanks

Answer 1

Another commonly used definition of delocalized electrons is when electrons in a covalently bonded compound are spread over more than two atoms. A covalent bond between two atoms is "localized" between the atoms, so if the electrons can be spread over three (or even more) atoms through resonance they are considered "delocalized."

Answer 2

"Delocalized electrons" means electrons that are mobile, being able to move from one location to another. For examples those valence electrons in metals, they are "delocalized electrons", which make metals good conductor of electricity.