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Whereas a pure molecular species has a definite stoichiometry, this is not often true for solids. Defects in crystals will include vacancies (atoms missing from their expected sites) and interstitials (extra atoms in sites normally open in the unit cell). An imbalance of defects involving different elements shall introduce nonstoichiometry. This is common in compounds of transition metals, where variable oxidation states are found. As describe, the sodium tungsten bronzes are formulated as NaxWO3, where x can have any value in the range 0-0.9.
Fig. 1. Alternative views of the CsCl structure
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Aufbau principle is not satisfied by: (1) Cr and Cl (2) Cu and Ag (3) Cr and Mg (4) Cu and Na Ans: Cu and Ag
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Properties and uses of D.D.T. (i) D.D.T. is approximately insoluble in water although it is moderately soluble in polar solvents. (ii) D.D.T. is a powerful insecticide. It i
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Grapes The components of grapes and grape products believed to play a significant role in preventing or delaying the onset of diseases including cancer and cardiovascular diseas
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In order to determine the standard electrode potential of an electrode, the electrode in standard conditions is connected to standard hydrogen electrode (SHE) to constitute a cell.
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