Structure and Properties of SOLIDS. Solids differ: Hardness Melting point Flexibility Conductivity Solids form crystal lattice structures: Repeating pattern of molecules Determined by x-ray crystallography Categories of solids: Ionic (metals + nonmetals) Metallic (metals) - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
freeze, they form a hexagonal crystal of H2O molecules linked by H bonds.
Covalent Networks• Highest melting pt
– held together by continuous directional covalent bonds
– C-C bonds in a network are interlocked and are stronger than the sum of individual C-C bonds
• Hard – Stronger than ionic or molecular crystals– Diamond- large tetrahedral network– SiO2: Quartz (a) and Glass (b)– Which do you think is stronger?
• Brittle• Insoluble • Non-conductive: e- movement restricted
by network
Covalent Networks of CARBON
• C can form 4 bonds• Many structures• Nanotechnology?• Graphite is able to
conduct electricity and is a lubricant– What is different about