Eng 45 - Chapter 1 - Structure(18)

Eng 45 - Chapter 1 - Structure(18) - Materials Scien ce...

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Materials Science Fall, 2007 Page 17 compound in which it appears. Second, if there are empty d-orbitals the atoms may approach closely enough that these overlap slightly and directly participate in bonding. There is almost always some contribution from d-bonding in solids or chemical compounds that include transition metals. 2.3 THE BOND MODEL 2.3.1 Bonding as an electrostatic interaction When two atoms approach one another their electrons and nuclei interact elec- trostatically. The electrons are mobile and, until the atoms are very close to one another, they can always configure themselves so that the net interaction is attractive. Atoms always bond to one another. The differences in the strengths of the bonds that are formed between different atomic species are due to differences in the specific electronic configuration that causes attraction. Ï r r 0 Binding Energy Fig. 2.1: Schematic drawing of the binding potential between two atoms as a function of their internuclear separation. In addition to the attractive interactions that draw atoms together, there are also
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This note was uploaded on 01/26/2010 for the course ENGLISH 45 taught by Professor Morris during the Spring '10 term at University of California, Berkeley.

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Eng 45 - Chapter 1 - Structure(18) - Materials Scien ce...

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