1. Lewis Diagram

2. What is a Lewis Diagram? Simplified Bohr diagrams which only consider electrons in outer energy levels are called Lewis Diagram. A Lewis Diagram consists of the element symbol surrounded by "dots" to represent the number of electrons in the outer energy level as represented by a Bohr Diagram. The number of electrons in the outer energy level is correlated by simply reading the Group number.

3. Example 1: Your element is Magnesium Draw the Bohr Model for it: Notice you have 2 valence electrons (in orange). These are used to draw the Lewis Diagram 12 p + 12 n o

4. Lewis Diagram for Magnesium You learned that Magnesium has 2 valence electrons, so now you can draw the Lewis Diagram 1 st step: write the symbol Mg 2 nd step: place the dots representing the valence electrons, around the symbol. There should be one electron on every side of the symbol, before you start pairing the electrons. Mg

5. Your turn Draw the Lewis Diagram for Neon