What are the differences between metallic and non metallic conductor?
The key feature that distinguishes metals from non-metals is their bonding. Metallic materials have free electrons. In the case of pure metals, the outermost layer of electrons is not bound to any given atom, instead these electrons are free to roam from atom to atom. Thus, the structure of metallic material can be thought of a consisting of positive centers (or ions) sitting in a “gas” of free-electrons . The existence of this free electron gas has a number of profound consequences for the properties of metallic materials. For example, one of the most important features of metallic materials is that freely moving electrons can conduct electricity and so metallic materials tend to be good electrical conductors. Some metals more closely resemble the idealized picture of free electrons than others. Consequently, some metals are better conductors of electricity than others (for example, copper is a more efficient electrical conductor than tin). Electrical conductivity is such an important
