NEET Exam > NEET Videos > Chemistry Class 12 > Close Packed Structures
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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Nov 21, 2024 Last updated |
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