Formation of 3 - N = number of electrons needed to achieve...

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Formation of Covalent Bonds We can use Lewis dot formulas to show covalent bond formation. 1. H molecule formation representation. Bond Lengths and Bond Energies For any covalent bond there is an internuclear distance where the attractive and repulsive forces balance This distance is the bond length Bond Lengths and Bond Energies At the bond length, the combination of bonded atoms is more stable than the separated atoms by an amount of energy. This energy difference is the bond energy. Writing Lewis Formulas: The Octet Rule N - A = S rule Simple mathematical relationship to help us write Lewis dot formulas.
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Unformatted text preview: N = number of electrons needed to achieve a noble gas configuration. – N usually has a value of 8 for representative elements. – N has a value of 2 for H atoms. A = number of electrons available in valence shells of the atoms. – A is equal to the periodic group number for each element. – A is equal to 8 for the noble gases. S = number of electrons shared in bonds. A-S = number of electrons in unshared, lone , pairs. Lewis Formulas for Molecules and Polyatomic Ions First, we explore Lewis dot formulas of homonuclear diatomic molecules. – Two atoms of the same element....
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This note was uploaded on 11/25/2011 for the course CHEM 1211 taught by Professor Atwood during the Fall '07 term at University of Georgia Athens.

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