Conductors & Insulators

Conductors are materials which allow the electrons to move freely inside them. All metals are good conductors because they contain a large number of free electrons inside them that can move easily from atom to atom.

Insulators do not allow electrons to pass through them. They do not contain free electrons inside them.

 

Conductors Insulators
All metals e.g. copper, silver, etc. Glass
Water Plastics
Skin Air
  Rubber