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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.
kcl crystal structure
Functional isomerism: This kind of isomerism is because of difference in the nature of functional group present in the isomers. The given pairs of elements all time form funct
For the n= 2 energy level, how many orbitals of all kinds are possible: (1) 2 (2) 3 (3) 4 (4) 5 Ans: 4
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The difference among Threshold energy and average energy of the molecules is known as activation energy.
chemical reaction of lactic acid
Question: a) List, with appropriate justifications, the most significant design parameters while constructing a landfill b) Draw the pattern of gas generation in a typical
If the velocity of hydrogen molecule is5*10^4 cm/sec tjen its de broglie wavelength is
ACTINIUM AND THE ACTINIDES Following actinium (group 3) are the 14 components of the actinide series (represented by the symbol An) combined with progressive filling of the 5
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