md2011-04-note_Part_2

md2011-04-note_Part_2 - O A I As we know by know the...

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O A I I As we know by know, the potential energy function is (typically) of this shape: U ( r ) r Equilibrium Attraction Pauli repulsion Purely repulsive potential 'Typical' attractive potential I At very small interatomic separations Coulombic repulsion between the nuclei dominates. I After this, Pauli rule and Coulombic interaction between the electrons of the two atoms are dominating contributors in the repulsion. I Attraction between two atoms can be due to van der Waals interaction , Coulomb interaction (for an ionic system), covalent bonding (pairing of valence electrons) or metallic bonding (sharing of valence electrons). Notes
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D W F B I Simplistic introduction by khanacademy can be found at YouTube (click http://is.gd/fEdrq for the video). Different kinds of atomic interactions are explained below. Ionic Bonding I Charge transfer occurs between two atoms which have a large difference in electronegativity: one of the atoms, typically a halogen, rips of an electron from the other one, typically an alkali metal.
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