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advt 468 x 60 A good conductor of electricity has free electrons to conduct electricity, i.e: small energy is required to move an electron from its bonded condition in the atom to a mobile condition. In diamond, no electron cab be released from covalent bond to conduct electricity. Pure diamonds do not conduct electricity. Hence they are used as electrical insulators. advt 468 x 60 Some diamonds have boron impurity, which results into blue color. Blue diamonds are semiconductors because of presence of boron. Boron takes the place of carbon atom in the diamond lattice resulting into some conductivity. In contrast, graphite is a good conductor of electricity because of presence of free single electron in each carbon atom. |
