110209a - How to draw Lewis Dot Structures y Step 1: count...

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Unformatted text preview: How to draw Lewis Dot Structures y Step 1: count the number of valence electrons y Step 2: Put central atom and arrange atoms around central atom y Step 3: Distribute electrons around all the atoms except the central atom y Step 4: Count up the number of electrons used and fill the octet on the central atoms by adding lone pairs or multiple bonds How many valence electrons does carbon have? o n e t w o t h r e e f o u r f i v e s i x s e v e n e i g h t 0% 6% 2% 1% 0% 9% 1% 82% 1. one 2. two 3. three 4. four 5. five 6. six 7. seven 8. eight Lewis Dot Structure Practice y Draw the Lewis dot structure for CO 2 y Draw the Lewis dot structure for NO- y Draw the Lewis dot structure for NO + Formal Charge y Helps us figure out the best Lewis structure y Electrons should be shared evenly between all the atoms y The structure with the formal charges closest to zero on all atoms will be the most stable y The more negative formal charge should go on the more electronegative atom Using Formal Charge y Find the correct Lewis dot structure for CNO- : What is the formal charge on C in CF 4 ?...
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This note was uploaded on 10/23/2010 for the course CHEM 105A taught by Professor Bau during the Fall '04 term at USC.

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110209a - How to draw Lewis Dot Structures y Step 1: count...

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