MSE2001H_2_3

MSE2001H_2_3 - Chapter 2 Atomic Scale Structures

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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 https://t-square.gatech.edu/portal
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2 Simple cubic Body-Centered Cubic (BCC) Face-Centered Cubic (FCC) Hexagonal Close Packing (HCP) Atomic Packing Factor (APF) Various Atomic Packings unitcell a of volume atom one of volume unitcell a in atoms of number unitcell a of volume unitcell a in atoms of volume APF × = = Assumption: atom is hard sphere.
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3 Simple cubic Body-Centered Cubic (BCC) Face-Centered Cubic (FCC) Hexagonal Close Packing (HCP) APF=0.52 APF=0.68 APF=0.74 APF=0.74 Atomic Packing Factor (APF)
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4
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5 Secondary Bonds Formation of a Temporary Dipole in an Argon Atom (Weak Secondary Bond)- van der Waals – London bond or van der Waals – London interaction + + - + - 1s 2 2s 2 2p 6 3s 2 3p 6 Secondary bond Isolated argon atom Statistical nature of electron motion occasionally creates a dipole and induces a dipole in an adjacent argon atom
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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_3 - Chapter 2 Atomic Scale Structures

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