Dear student, Insulators have their atoms and electrons tightly bound that does not move quickly throughout the material. Thus, they possess a high resistivity and low conductivity. The good insulators have higher resistivity and lower conductivity than the poor insulators. E.g., Plastic The material having their electrons loosely bound are the conductor. They have low resistance and high conductivity. E.g., Copper. Hence, the poor conductors are good insulators, and the poor insulators are good conductors. Regards.