3 Assume that Sodium is a monovalent free-electron metal and has abody-centric cubic structure.(i) Answer in eV. If the cubic cell side of sodiumis 0.4225 nm, calculate its Fermi energy.(ii) Calculate the electrical resistivity of sodiumat room temperature (assume a mean-freeelectron path equal to the inter-atomicseparation) and tell why this does not explainthe measured conductivity.(iii) If the actual resistivity of a sample ofsodium at room temperature is 5x10 n cm,estimate its expected thermal conductivity,stating any assumptions you are making.

At absolute zero temperature, the Fermi energy is the energy difference between the highest and…

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