Virtual Labs

Which of the following is true about the relationship between lattice points and unit cells?

a: Each lattice point represents an individual atom or molecule. Explanation

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b: A unit cell can contain multiple lattice points. Explanation

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c: Lattice points are only located at the corners of unit cells. Explanation

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d: The number of lattice points in a unit cell is always equal to one. Explanation

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In a body-centered cubic (BCC) lattice, where are the lattice points located?

a: At the corners only. Explanation

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b: At the corners and the center of each face. Explanation

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c: At the corners and the center of the cell. Explanation

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d: At the center of each edge. Explanation

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How does the choice of unit cell affect the calculated density of a crystal?

a: The choice of unit cell does not affect the calculated density. Explanation

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b: Using a non-primitive unit cell will result in a higher calculated density. Explanation

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c: Using a primitive unit cell will result in a higher calculated density. Explanation

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d: The calculated density is only accurate when using the smallest possible unit cell. Explanation

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Which of the following statements is true regarding the selection of unit cells in a crystal lattice?

a: There is only one correct way to choose a unit cell for a given lattice. Explanation

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b: Different choices of unit cells can represent the same lattice structure. Explanation

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c: Non-primitive unit cells are always larger than primitive unit cells. Explanation

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d: Primitive unit cells cannot be used to represent complex crystal structures. Explanation

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Why might one choose to use a non-primitive unit cell over a primitive one?

a: To simplify the visualization of the crystal structure. Explanation

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b: To reduce computational complexity in simulations. Explanation

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c: To ensure accurate density calculations. Explanation

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d: To eliminate redundant lattice points. Explanation

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Which statement about surface energy in crystals is correct?

a: Surface energy depends only on the type of material, not the crystallographic orientation. Explanation

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b: Surface energy is higher for surfaces with higher atomic packing density. Explanation

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c: Surfaces with lower atomic packing density have higher surface energy. Explanation

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d: All crystal surfaces have the same surface energy. Explanation

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Unit Cells