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Close Packed Structures Video Lecture | Chemistry Class 12 - NEET

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FAQs on Close Packed Structures Video Lecture - Chemistry Class 12 - NEET

1. What is a close-packed structure?
Ans. A close-packed structure refers to a arrangement of atoms or particles in a crystal lattice where the spheres are positioned as close together as possible, with minimal empty space between them. This arrangement maximizes the packing efficiency in a crystal lattice.
2. What are the two types of close-packed structures?
Ans. The two types of close-packed structures are the hexagonal close-packed (hcp) structure and the face-centered cubic (fcc) structure. In the hcp structure, the spheres are arranged in a hexagonal pattern, while in the fcc structure, the spheres are arranged in a cubic pattern with an additional sphere in the center of each face.
3. How are close-packed structures relevant in materials science and engineering?
Ans. Close-packed structures play a crucial role in materials science and engineering as they determine the mechanical, thermal, and electrical properties of materials. The arrangement of atoms or particles in a close-packed structure affects factors such as strength, ductility, conductivity, and optical properties, making it essential for designing and understanding various materials.
4. What are some examples of materials that exhibit close-packed structures?
Ans. Many metallic elements, such as gold, silver, and aluminum, exhibit close-packed structures. Additionally, certain ceramic materials, including zinc oxide and magnesium oxide, can also adopt close-packed structures. These materials are widely used in industries ranging from construction to electronics due to their desirable properties.
5. How does the close-packed structure relate to the density of a material?
Ans. The close-packed structure is directly related to the density of a material. Close-packed structures have a higher packing efficiency, meaning a larger fraction of the space is occupied by atoms or particles. Consequently, materials with close-packed structures tend to have higher densities compared to those with less efficient packing arrangements.
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