Solid State Classification
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Questions and Answers

Which of the following is considered a type of crystalline solid?

  • Amorphous solid
  • Gaseous crystalline solid
  • Opanic crystalline solid
  • Metallic crystalline solid (correct)
  • What is the packing efficiency of a face-centered cubic lattice?

  • 74% (correct)
  • 52.4%
  • 68%
  • 48%
  • What is the value of Z for a body-centered cubic lattice?

  • 4
  • 2 (correct)
  • 3
  • 1
  • The smallest repeating unit in a crystal lattice is called:

    <p>Unit cell</p> Signup and view all the answers

    Which of the following is an example of a crystalline solid?

    <p>Quartz</p> Signup and view all the answers

    What is the packing efficiency of a simple cubic lattice?

    <p>52.4%</p> Signup and view all the answers

    Which type of crystalline solid has strong directional bonds?

    <p>Covalent crystalline solid</p> Signup and view all the answers

    What is the three-dimensional arrangement of particles in a crystal called?

    <p>Crystal lattice</p> Signup and view all the answers

    In a face-centered cubic lattice, how many atoms are effectively present per unit cell?

    <p>4</p> Signup and view all the answers

    Which type of solid generally has low melting points and is soft in nature?

    <p>Amorphous solid</p> Signup and view all the answers

    Study Notes

    Solid State Classification

    • Solids are classified based on their internal structure.
    • Crystalline solids have a regular, three-dimensional arrangement of particles.
    • Amorphous solids lack a regular arrangement of particles.

    Types of Crystalline Solids

    • Atomic Crystalline Solids: Made up of atoms, e.g., quartz, diamond, and metals.
    • Ionic Crystalline Solids: Made up of ions, e.g., sodium chloride.
    • Molecular Crystalline Solids: Made up of molecules, e.g., dry ice.
    • Metallic Crystalline Solids: Made up of metal ions, e.g., copper.

    Characteristics of Solids

    • Solid particles are closely packed, resulting in strong intermolecular forces.
    • Solids are typically rigid and non-compressible.

    Crystal Lattice and Unit Cell

    • Crystal Lattice: A three-dimensional arrangement of particles in a crystal.
    • Unit Cell: The smallest repeating unit of a crystal lattice.
    • A unit cell can be represented by a point in a crystal lattice.

    Coordination Number (Z)

    • Simple Cubic Lattice: Z = 1
    • Body-Centered Cubic Lattice: Z = 2
    • Face-Centered Cubic Lattice: Z = 4

    Packing Efficiency

    • Packing Efficiency = (Total volume occupied by particles) / (Total volume of the unit cell)
    • Simple Cubic Lattice: 52.4%
    • Body-Centered Cubic Lattice: 68%
    • Face-Centered Cubic Lattice: 74%

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    Description

    Learn about the classification of solids based on their internal structure, including crystalline and amorphous solids, and types of crystalline solids.

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