Explain how metallic conductors, semiconductors, and insulators are identified and explain their properties in terms of band theory. Why is graphite an electronic conductor and diamond an insulator?

Q: The first LEDs were made from GaAs, which has a bandgap of 1.43 eV. What wavelength of light would…

A: Unit of energy is converted as follows,

Q: Explain how homogeneous and heterogeneous alloys differ. Describe the differences between…

A: An alloy is a uniform mixture. It is made up of two or more chemical elements, of which at least one…

Q: (non-ferromagnesian) silicates with the dark (ferromagnesian) silicates and list three minerals…

A: Silicates can be generally divided into  two  light and dark silicates. the dark silicates are also…

Q: A compound of Sn, Cd and P are mixed together to synthesize a semiconductor. The phosphorous atoms…

A: we have to  determine the formula of the compound

Q: Determine the lattice constant, a (in nm), of a metal conforming to the FCC structure having an…

A: For a FCC lattice the relation between lattice constant (a) and radius of atom (r) is 4r=2a Here…

Q: You would like to select a material for electrical contacts in an electrical switching device which…

A: The materials that have to be used for electrical contacts in an electrical switching device must…

Q: The number of vacancies in a metal decreases by a factor of 6. When Temperature is decreased from…

A:

Q: Calculate the number of molecular orbitals present in the valence band of a lithium crystal with a…

A: Given: Mass of lithium crystal = 2.52 g And we know that the molar mass of lithium = 6.941 g/mol

Q: 4. About the surface energy; (a) The surface energy of a single crystal depends on the…

A: (a) Answer - According to the question - Given - The surface energy of a single crystal depends on…

Q: Describe the process of doping and explain how it alters the atomic structure of silicon.

A:

Q: Silicon (Si) and germanium (Ge) can be used as semiconducting materials. The band gap between the…

A: Each metal or metalloid is capable of conducting current when the valence electrons of the atom can…

Q: The angle of diffraction of (220) set of planes for an FCC element occurs at 69.22° when…

A: Here Bragg's Law help us to find the atomic radius of the given element. nλ=2dsinθθ=diffracting…

Q: silicon

A: Pure semiconductor have high resistance power so that it's conduct less electricity this is due to…