MSE2001H_2_1

MSE2001H_2_1 - Chapter 2 Atomic Scale Structures 1 2 3 4 5...

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1 1. Introduction 2. Atomic Structure 3. Thermodynamics and Kinetics 4. Primary Bonds 5. Bond-Energy Curve 6. Atomic Packing 7. Secondary Bonds 8. Mixed Bonds Chapter 2 Atomic Scale Structures
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2 Introductory Remarks for Chapter 2 Atomic Scale Structures • Why do certain materials have particular sets of properties? – Why are metals good electrical conductors while plastics and ceramics are good insulators ? – Why are some materials stiff, and what controls the stiffness ? – Why do some materials expand with temperature while others do not?
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3 Introductory Remarks for Chapter 2- Atomic Scale Structures • Although properties depend on all levels of structure, many are determined by the atomic scale. – The types of atoms present. – The types of bonds in the material. – The way the atoms are packed. • In Chapter 2 we review – Structure of the atom – Basic concepts from thermodynamics and kinetics – Types of bonds
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4 Au (111) surface AFM (Atomic Force Microscope) Atom ? Xenon on Nickel (110) STM (Scanning Tunneling Microscope)
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5 Atom ? All matter is composed of atoms All atoms are composed of nucleus and electrons All nucleus consist of protons and neutrons Properties of an atom are determined by: (1) number of electrons or protons in a neutral atom; (2) mass; (3) distribution of electrons in orbits; (4) energy of electrons; (5) ease of adding or removing electrons to create a charged ion
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This note was uploaded on 06/29/2009 for the course MSE 2001 taught by Professor Tannebaum during the Spring '08 term at Georgia Tech.

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MSE2001H_2_1 - Chapter 2 Atomic Scale Structures 1 2 3 4 5...

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