Wavefunctions for certain particles in these materials can be written as a plane wave using the NFE approximation. The ratio of two properties of these materials has a linear dependence on temperature by the Wiedemann–Franz law. Low-temperature examples of these non-helium materials are modeled as Landau–Fermi liquids. (-5[1])At high (-5[1])pressures, hydrogen is predicted to behave as one of these (10[1])materials. (10[1]-5[1])These materials are represented by an electron gas in the Drude model, (10[1]-5[1])which is improved upon by the free-electron model. These materials (10[1])are modeled as crystal lattices of cations in which electrons can freely move. These materials tend to be ductile and malleable. (10[1])For 10 points, name these materials that are thermally and electrically conductive and include aluminum and iron. ■END■ (10[4])