2. The lattice constant of Si is a =3.57 at room temperature, T=300K. At this temperature,...

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2. The lattice constant of Si is a =3.57 at room temperature, T=300K. At this temperature, the volumetric density of electron-hole pairs is 100 (1/cm). resulting from thermal excitation. Calculate the ratio between the electron density and the atomic density. 3. Use the silicon lattice constant given in the above problem (Problem 2), find the number of atoms per square centimeter in silicon in the (100) and (110) planes. 2. The lattice constant of Si is a =3.57 at room temperature, T=300K. At this temperature, the volumetric density of electron-hole pairs is 100 (1/cm). resulting from thermal excitation. Calculate the ratio between the electron density and the atomic density. 3. Use the silicon lattice constant given in the above problem (Problem 2), find the number of atoms per square centimeter in silicon in the (100) and (110) planes.