Why some materials are strong weak or non-conductors?

Answer 1

The strength of a material is determined by its atomic structure and bonding. Strong materials have a well-organized structure with strong atomic bonds, while weak materials have a less organized structure with weaker bonds. Materials can be non-conductors if they have a full valence electron shell or lack mobile charge carriers. Conductivity depends on the ability of a material to allow the flow of electrons or ions.