Out of every 1000 Tera atoms in pure Si, 28 atoms provide a free electron at room temperature. (1) What is the fraction (to 2 significant figures or will be marked wrong) of Si atoms that produce a conduction electron? (2) What is n, the density of conduction electrons? Answer must be to 2 significant figures or will be marked wrong. [1/m^3] Ne

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A: thank you

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The Space Lattice and Unit Cells

Every matter consists of atoms, molecules, and ions. If these atoms, molecules, and ions (micro-particles) are represented in a three-dimensional space-occupying certain specific points in space, then these arrangements are termed as space lattices and the specific points which are being occupied by atoms, molecules and ions are termed as lattice points. The atoms, molecules, and ions at the lattice points are generally grouped in a regular fashion and repeat periodically at the three-dimensional space.