Non-metals, however, hold onto the electrons in their atoms much more strongly,#tosee WHY? This makes them good insulators, preventing most forms of Charge Transfer.
However, this doesn’t mean they prevent all charges from transferring through them. An insulator is still susceptible to charge transfer via:
A charged object touching an insulator will still transfer some charge directly only the surface of the insulator, resulting in a spot of charge build-up.
Examples
- Wood
- Glass
- Air
- Pure water (Normal water can contain dissolved ions, which can conduct charges).