Concept explainers
Interpretation:
Whether diamond or graphite shows the greater density needs to be determined.
Concept introduction:
In diamond, it has a tetrahedral arrangement of carbon atoms. Each carbon atom is attached to four other carbon atoms via covalent bonds with
Graphite is also arranged in an infinite array, but it has a layered structure. Each carbon atom is bonded to three other carbon atoms and arranged at the corners of a network of regular hexagons with a 1200 bond angle. These planar arrays are held together by stacking interactions which are weaker forces. The distance between two layers is
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General Chemistry: Principles and Modern Applications (11th Edition)
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- The CsCl structure is a simple cubic array of chloride ions with a cesium ion at the center of each cubic array (see Exercise 69). Given that the density of cesium chloride is 3.97 g/cm3, and assuming that the chloride and cesium ions touch along the body diagonal of the cubic unit cell, calculate the distance between the centers of adjacent Cs+ and Cl ions in the solid. Compare this value with the expected distance based on the sizes of the ions. The ionic radius of Cs+ is 169 pm, and the ionic radius of Cl is 181 pm.arrow_forwardSilicon carbide, SiC, is a very hard, high-melting solid. What kind of crystal forces account for these properties?arrow_forwardRubidium chloride has the sodium chloride structure at normal pressures but assumes the cesium chloride structure at high pressures. (See Exercise 69.) What ratio of densities is expected for these two forms? Does this change in structure make sense on the basis of simple models? The ionic radius is 148 pm for Rb+ and 181 pm for CI.arrow_forward
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