Question: What is the difference between the energies at which the Fermi factor is 0.9 and 0.1 at 300 K in (a) Copper, (b) Potassium, and

What is the difference between the energies at which the Fermi factor is 0.9 and 0.1 at 300 K in

(a) Copper,

(b) Potassium, and

(c) Aluminum.

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