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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.
Why is zinc is not extracted from zinc oxide through reduction with CO? Solution) Reducing agent should have more negative ΔG value. In case of zinc oxide ,Zn has more negativ
Attacking Reagents - Organic chemistry The fission of the substrate molecule to make centres of high or low electron density is affected by attacking reagents. Most of the atta
It gives Meta Bromo Benzoic acid.
conclusion for the project
As the electron move away from the nucleus,its potential energy
A house is air conditioned using solar energy. Solar radiation heats a pressurized tank such that the temperature is maintained at 175 o C. 1500 kJ must be extracted from the hou
A water solution have 64% Na 2 S 2 O 2 together with 1.0% soluble impurity. Upon cooling to 5°C, Na 2 S 2 O 2 ·5H 2 O. crystallizes out. The solubility of this hydrate is 1.35
capillarity
Visualisation of hybrid orbitals -C atomic orbitals Hybrid orbitals are the result of a model which combines atomic orbitals on a single atom in the ways that lead to a new se
molecular chlorine and molecular fluorine combine to form a gaseous product.Under the same conditions of temperature and pressure it is found that one volume of Cl2 reacts with thr
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