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Conductors, semiconductors and insulators

Conductors, semiconductors and insulators Materials are classified as conductors, insulators, or semiconductors according to their electric conductivity. The classifications can be understood in atomic terms. Electrons in an atom can have only certain well-defined energies, and, depending on their energies, the electrons are said to occupy particular energy levels. In a typical atom with many … Read more

Polymers and their uses

A molecule of high relative molecular mass, the structure of which essentially comprises the multiple repetition of units derived, actually or conceptually, from Molecules of low relative molecular mass is called a polymer. A polymer  is a large molecule, or macromolecule, composed of many repeated subunits. Due to their broad range of properties,both synthetic and … Read more