To learn about the types of crystalline solids

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Objectives

1. To learn about the types of crystalline solids
2. To understand the interparticle forces in
   crystalline solids
3. To learn how the bonding in metals determines
   metallic properties

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A. The Solid State Types of Solids

• Crystalline solids

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A. The Solid State Types of Solids
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A. The Solid State Types of Solids
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B. Bonding in Solids
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B. Bonding in Solids
Ionic Solids

• Stable substances with high melting points
• Held together by strong forces between ions

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B. Bonding in Solids
Molecular Solids

• Fundamental particle is a molecule
• Melt at relatively low temperatures
• Held together by weak intermolecular forces

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B. Bonding in Solids
Atomic Solids

• Fundamental particle is the atom
• Properties vary greatly
• Group 8 - low melting points
• Diamond - very high melting point

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B. Bonding in Solids
Bonding in Metals

• Metals are held together by nondirectional
  covalent bonds (called the electron sea model)
  among the closely packed atoms

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B. Bonding in Solids
Bonding in Metals

• Metals form alloys of two types

• Substitutional different atoms are substituted
  for the host metal atoms

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B. Bonding in Solids
Bonding in Metals

• Metals form alloys of two types

• Interstitial small atoms are introduced into
  the holes in the metallic structure