1. Lewis Dot Structure

2. What is it?
A way of showing how many valence electrons an element has

3. Valence Electrons Electrons in the outer-most orbital
Important because they determine properties of elements

4. Finding # of Valence Electrons
Use the periodic table (groups) to figure out how many electrons are in the outermost orbital
A full orbital has 8 electrons
Count the towers!
Group 1 = 1 valence e-
Group 2 = 2 valence e-
Group 13 = 3 valence e-
Group 14 = 4 valence e-
Group 15 = 5 valence e-
Group 16 = 6 valence e-
Group 17 = 7 valence e-
Group 18 = 8 valence e-

5. Lewis Dot Structure First find the element symbol
Find the # of valence electrons
Draw a dot around the element for each electron