Molecular Structure

Molecular Structure - Molecular Geometry of Covalent...

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Unformatted text preview: Molecular Geometry of Covalent Molecules Lewis Structures Valence Shell Electron Pair Repulsion Theory Molecular Polarity Valence Bond Theory (Hybridization) The Octet (Eight Electron) Rule Applies to atoms of the representative elements of the s and p blocks (Groups 1, 2, 13-18). Each atom in a molecule seeks to achieve an s 2 p 6 valence shell electronic configuration, through electron transfer, leading to ionic bonding. electron sharing, leading to covalent bonding. Exceptions to the rule include H - achieves a stable s 2 configuration. Be - achieves a stable s 2 p 2 configuration, as in BeH 2 . B - achieves a stable s 2 p 4 configuration, as in BF 3 . Nonmetals in period 3 and above possessing d orbitals and capable of valence shell expansion . Constructing Lewis Structures of Simple Covalent Substances Step 1: Identify the central and terminal atoms. Step 2: Sum the number of valence electrons of all atoms. Step 3: Connect each terminal atom to the central atom with 2 (bonding)...
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Molecular Structure - Molecular Geometry of Covalent...

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