Diamond and graphite are the two crystalline allotropic forms of carbon . However, they differ in most of their physical characteristics . For example, diamond is very hard while graphite is quite soft. Diamond is a poor conductor of electricity. On the other hand, graphite is a good conductor. (i)Why is diamond hard while graphite is soft? (ii) Why is diamond a poor conductor of electricity while graphite is a good conductor? (iii) Why are certain diamonds very shining ? (iv) What is the value associated with diamonds?
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(1) because their molecular structure is different from each other. Carbon atoms in graphite are bonded in layers with only weak covalent bonds holding the layers together. Carbon atoms in diamond are bonded in a stronger tetrahedron pattern.
(2) Each Carbon gives one pair of delocalized electrons. This makes graphite a good conductor of electricity.
(3)Diamonds are cut so that a light ray falling on the diamond is reflected multiple times inside the diamond and therefore sends light out in all directions. Actually, diamonds don't shine, they reflect.
(2) Each Carbon gives one pair of delocalized electrons. This makes graphite a good conductor of electricity.
(3)Diamonds are cut so that a light ray falling on the diamond is reflected multiple times inside the diamond and therefore sends light out in all directions. Actually, diamonds don't shine, they reflect.
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