1. Solids

2. Molecules

3. Vibration motion Vibration motion Vibration motion

4. Types of solids Crystalline solids fall into one of four categories. Type of Solid Intermolecular Forces PropertiesExamples Ionic High Melting Point, Brittle, HardNaCl, MgO Molecular Hydrogen Bonding, Dipole-Dipole, London Dispersion Low Melting Point, NonconductingH 2, CO 2 MetallicMetallic Bonding Variable Hardness and Melting Point (depending upon strength of metallic bonding), Conducting Fe, Mg Covalent Network Covalent Bonding High Melting Point, Hard, Nonconducting C (diamond), SiO 2 (quartz)

5. Crystals

6. Ionic solids Made up of a metal and non-metal Made up of a metal and non-metal Hard and Brittle Hard and Brittle High melting point of over 300 degrees C High melting point of over 300 degrees C Includes NaCl, AlCl 3 Includes NaCl, AlCl 3

7. Molecular Solids A molecular solid is a solid composed of molecules held together by relatively weak intermolecular forces, or IMF’s A molecular solid is a solid composed of molecules held together by relatively weak intermolecular forces, or IMF’ssolid moleculesintermolecular forcessolid moleculesintermolecular forces Melting points are less than 300 degrees C Melting points are less than 300 degrees C

8. Metals Metals are ductile Metals are ductile Metals conduct electricity Metals conduct electricity Metals have luster Metals have luster Metals are malleable Metals are malleable Why? Why? Metals have “delocalized” electrons. Metals have “delocalized” electrons. Metals

9. Network solids Network solids are giant arrangements of matter in which atoms are covalently bonded together. You can think of network solids as giant molecules. Network solids are giant arrangements of matter in which atoms are covalently bonded together. You can think of network solids as giant molecules. Molecular solids include Carbon as both Diamond and graphite. Molecular solids include Carbon as both Diamond and graphite.