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CRYSTALLINE SOLIDS
Solids may be loosely categorized into two groups. Amorphous solid has no long-range order in their molecular or atomic structure. By their nature Amorphous solids are not easily studied, since the powerful analytical methods which are described in Topic A6, for example, are not applicable to such disordered structures. In contrast crystalline solid which consist of ordered three-dimensional array of a structural motif and such as an molecule, atom or ion. This internal order is reflected in the familiar macroscopic structure of crystalline materials, which typically have highly regular forms with flat crystal faces. It is this order and regularity which enables much simpler structural studies of crystalline materials.
The Seven Crystal System
interpertation of dta
#space lattice, unit cell, calculation of particles per unit cell, laws of crystallography, symmetry elements in crystals, derivation of braggs equation#
Reaction of conjugate addition This reaction is a "conjugate addition" of cyanide ion on a cyclopropane. Notice that reaction at the least branched carbon of the cyclopropane
The number of d electrons in Fe +2 (atomic number of Fe= 26 ) is not equal to that of the: (1) p-electrons in Ne (At. No.= 10) (2) s-electrons in (At. No.= 12)
calculate the enthalpy of combustion for acetic acid using standard enthalpies of formation.
The most important classification of elements is that of non-metallic versus metallic. Metallic elements form solids that are good conductors of electricity, and where bonding is n
..a simple set of diagrams to demonstrate dna replication at the biochemical level
preperations
Drugs or Medicines from plants 1. Bark of willow tree that consists of salicylic acid. It is employed to take relief from fever and pain. 2. Alkaloid Reserpine that is taken
The ratio of area covered by second orbital to the first orbital is: (1) 1 : 2 (2) 1 : 16 (3) 8 : 1 (4) 16 : 1 Ans: 16 : 1
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