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The band model of solids is an extended of the molecular orbital (MO) method. The overlap of atomic orbitals in an extended solid produces rise to continuous bands of electronic energy levels associated with different degrees of bonding. In a simple monatomic solid the bottom of the band is build up of orbitals bonding between all neighboring atoms; orbitals at the top of the band are antibonding, and levels in the middle have an intermediate bonding character. Different atomic orbitals may, in principle, give rise to different bands, although they may overlap in energy.
Fig. 1. Band picture for (a) nonmetallic and (b) metallic solid; occupied electronic levels are shown shaded.
Increases in temperature approximately in accordance with the Arrhenius equation used in chemical kinetics.
In order to determine the standard electrode potential of an electrode, the electrode in standard conditions is connected to standard hydrogen electrode (SHE) to constitute a cell.
Q. Show the Particle nature of light? Particle nature of light One of the first main clues to the electron structure of atoms was Albert Einstein's explanation of the photoe
(a) Write chemical equations for the reactions of glucose with (i) Acetic anhydride and (ii) ammoniacal silver nitrate solution. (b) Draw simple Fischer projections of D-g
Application of catalyst in industries
work is not a state function. Explain
The word "cereal" is derived from the name of the Roman grain or harvest goddess, Ceres. Cereals are the seeds of the grass family. These are the complex carbohydrates and consist
The hybradization state of the Fe among [Fe(CN)6]3-,[Fe(CO)5] and [Fe(H2O)6]2+ is Ans) D2SP3,DSP3,SP3D2
concentration on acetic acid
INTRODUCTION : In this exercise you will learn various steps and procedures adopted while purchasing lab-related items. This exercise will acquaint you with practices of preparing
a) During coagulation, the colloidal particles stay un-aggregated because: b) The aim during water softening is to precipitate calcium and magnesium as calcium carbonate and mag
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