Lewis DotRules - Rules for drawing Lewis dot structures 1...

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Unformatted text preview: Rules for drawing Lewis dot structures 1. Count the number of valence e- each atom brings into the molecule. For ions, the charge must be taken into account. How many valence electrons in BeCl 2 ? How many valence electrons in NO 2- and NO 2 + ? 1. Put electron pairs about each atom such that there are 8 electrons around each atom (octet rule), with the exception of H, which is only surrounded by 2 electrons. Sometimes it's necessary to form double and triple bonds. Only C, N, O, P and S (rarely Cl) will form multiple bonds. Draw the Lewis dot structure for CF 4 . The number of valence electrons is 4 + 4 ( 7 ) = 32 electrons. So, we obtain: Draw the Lewis dot structure for CO. The number of valence electrons is 4 + 6 = 10 electrons or 5 pairs. Since both C and O allow multiple bonds we can still follow the octet and write: 2. If there is not enough electrons to follow the octet rule, then the least electronegative atom is left...
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This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.

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Lewis DotRules - Rules for drawing Lewis dot structures 1...

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