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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.
plz explain me about buffer capacity and its type
The specific charge of proton is 9.6 X 10 6 CKG -1 then for an α-particle it will be : (1) 38.4X 10 7 Ckg -1 (2) 19.2x 10 7 Ckg -1 (3) 2.4 x 10
Inductive effect - Relative reactivity of aldehydes and ketones The comparative re-activities of aldehydes and ketones in nucleophilic addition reactions might be attributed to
The correct order of increasing energy of atomic orbitals is: (1) 5p (2) 5p (3) 4f (4) 5p Ans: 5p
Electron occupies the available orbital singly before pairing in any one orbital occurs, it is : (1) Pauli's exclusion principle (2) Hund's Rule (3) Heisenberg's principle
Why cyclo propane is more stable than cyclohexane
Basics of Periodic Table.
Q. Illustrate the Physical properties of Ammonia? Ans. Ammonia is a colorless gas that has a strong penetrating odor. It boils at -33 o C and is easily liquefied by press
What is hydrometallurgy
Mesomeric forms are the possible locations of electrons at a single instant, if you get what I mean. Like, an adjacent double and single bond in a molecule. The resonance form, how
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