1. LEWIS MODEL

2. Do Now: What is a valence electron?
The electrons in the outermost shell
Groups go vertically
Group 1 has 1 valence electron (VE)
Group 2 has 2 VE
Group 13 has 3 VE
Group 14 has 4 VE
Group 15 has 5 VE
Group 16 has 6 VE
Group 17 has 7 VE
Group 18 has 8 VE

3. 1 17 18 2 13 14 15 16

4. H Li Now, you try Lithium Lewis Structures
Find Hydrogen on the periodic table
What group is it in?
How many valence electrons does it have? H
Hydrogen is in the first group and has 1 valence electron so it gets 1 dot.
Now, you try Lithium Li

5. You go COUNTERCLOCKWISE
Find Al (Aluminum)
What group is it in? 3
How many valence electrons does it have?
Find Mg (Magnesium)
What group is it in? 2
How many valence electrons does it have? Al Mg

6. You go COUNTERCLOCKWISE
Find C (Carbon)
What group is it in? 14
How many valence electrons does it have? 4
Find Nitrogen
What group is it in? 15
How many valence electrons does it have? 5 C N

7. You go COUNTERCLOCKWISE
Find F (Flourine)
What group is it in? 17
How many valence electrons does it have? 7
Find O (Oxygen)
What group is it in? 16
How many valence electrons does it have? 6 F O

8. You go COUNTERCLOCKWISE
Find He (Helium)
What group is it in? 18
How many valence electrons does it have? 8 He

9. On your worksheet, try these elements on your own:Na P Cl