Our first lesson for out new unit over chemical bonding was reviewing the Lewis Dot structure that some of us learned back in Freshman year. This model is when you take the element symbol and place the electrons around the outside on each of the four sides clockwise and singularly, then you can double.
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http://www.middleschoolchemistry.com/img/content/multimedia/chapter_4/lesson_6/lewis_dot_table_big.jpg
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We also learned about the octet rule, which states most elements can only hold eight electrons in their valence shell, but we also leaned there are exceptions to this. These are that Hydrogen and Helium only have up to two, Boron requires six, and Beryllium only needs 4.
To end the lesson, we went over the Have, Need, Share chart to determine the number of electrons and bonds to place on the diagrams.
Here is what that type of diagram looks like:
Here are some additional links for help:
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