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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.
how yield of ether is highest when the halide ion is displased from a primary rather than secondary or tertiary halide?
WHAT IS USE OF ION PAIR REAGENTS? The chemical substances that pair each other, to produces complexes. These can use for stabilization of one of the molecule that is more active
separation of metal
Q. Significant figures of the number of digits? Significant figures of the number of digits reported in a measurement signify how precise the measurement is. The further di
how carbon tetra-valency lead to stability?
Why do Zr and Hf show similar properties?
(i) How would you account for the following: (a) The transition elements exhibit high enthalpies of atomization. (b) The 4d and 5d series of the transition metals have more
i would like to write report
Non-benzenoid aromatics and Heterocyclic compounds There are aromatic compounds that have structural units which are not same from benzenoid type and are termed as Non-benzeno
I well know about electromagnetic spectrum but I did not know the any scope of spectroscopy & I want to know about I r spectra in detail & absorption spectroscopy.
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