1. Section 14.3 Properties of Solids 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 Objectives

2. Section 14.3 Properties of Solids A. The Solid State: Types of Solids Crystalline solids

3. Section 14.3 Properties of Solids A. The Solid State: Types of Solids

4. Section 14.3 Properties of Solids A. The Solid State: Types of Solids

5. Section 14.3 Properties of Solids B. Bonding in Solids

6. Section 14.3 Properties of Solids B. Bonding in Solids Stable substances with high melting points Held together by strong forces between ions Ionic Solids

7. Section 14.3 Properties of Solids B. Bonding in Solids Fundamental particle is a molecule Melt at relatively low temperatures Held together by weak intermolecular forces Molecular Solids

8. Section 14.3 Properties of Solids B. Bonding in Solids Fundamental particle is the atom Properties vary greatly –Group 8 - low melting points –Diamond - very high melting point Atomic Solids

9. Section 14.3 Properties of Solids B. Bonding in Solids Metals are held together by nondirectional covalent bonds (called the electron sea model) among the closely packed atoms Bonding in Metals

10. Section 14.3 Properties of Solids B. Bonding in Solids Metals form alloys of two types Bonding in Metals –Substitutional – different atoms are substituted for the host metal atoms

11. Section 14.3 Properties of Solids B. Bonding in Solids Metals form alloys of two types Bonding in Metals –Interstitial – small atoms are introduced into the “holes” in the metallic structure