Chem Class - March 24, 2010

And so, we continue...

Covalent Bonding
- Electrons are shared between non-metals
- To draw Lewis Dot Diagrams:

1. Add the valence e- in all atoms
2. Identify which atom can form the most number of bonds. This will be the central atom
3. Bonds between two atoms are repesented by a line. This repesents 2e-.
4. Any e not creating bonds are placed in paris around the remaining atoms
5. All valence levels must be filled, all electrons must be used

Double and Triple Bonds
- Some compounds form more than one bond between two elements

(To the left of the element or compund is a Lewis Diagram and a Structural Diagram. You can see that there are sometimes two or three lines that separate the elements in the Structural Diagram. These represent the double and triple bonds.)

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For more help, this is a link that leads you to a geat little slide show on Lewis Dot Structures of Covalent bonds. It also gets you involved by having you type in the answers:
http://www.wisc-online.com/objects/ViewObject.aspx?ID=GCH6404