In our studies of atoms and molecules we have seen that molecular orbitals are formed by the interaction of atomic orbitals. In molecular orbitals of H2 for example, the binding orbital is separated from the antibonding orbital by several electron-Volts ( 1eV = 23.06 kcal / mol ). When three orbitals from three atoms ( as in the case of H3 ) combine to form MOs, we get three orbitals ( , and ), a bonding, a nonbonding and an antibonding orbital. When N atomic orbitals from N atoms interact, they give N molecular orbitals. When N becomes very large, as in the case of a solid, there will be a large number of orbitals in a given range of energy, say between and . This collection of orbitals or energy levels is referred to as an (energy) band. The study of band structure forms a central theme in the study of electronic structure of solids.
- Introduction to spectroscopy in engineering chemistry free pdf download
- Solid State Chemistry in engineering chemistry free pdf download
- Frequency Band Designations,satellite communication,free pdf download
- Applications of UV in analytical chemistry in engineering chemistry pdf free download
- Band structures in insulators, metals and semiconductors in engineering chemistry download pdf