BANDAS DE ENERGIA, ORIGEN Y CONSECUENCIAS

In crystalline material exists energy band gaps where the electrons can move freely, so, these bands are the results of atomic levels superposition that form a crystal. When the individuals’ atoms are closing to form a crystal, they take a place in a periodic arrangement forming a crystalline lattice, where their atomic energy levels interact themselves, forming energy band gaps. A simple illustration of the atomic origins of some band gaps is given with an example of a linear chain of atoms in which each atom is associated with two states. The classification of metals insulates and semi conductors according with the band gaps theory is described and the concept of metallic bond is introduced as a nsaturated covalent bond