1. How to Draw Lewis Dot Diagrams
S. Staron 2-11

2. Groups Group 18 = 8 electrons Group 1 = 1 electron
Except for He, it has 2 electrons
Group 1 = 1 electron
Group 2 = 2 electrons
Each column is called a “group”
3, 4, 5, 6, 7
Each element in a group has the same number of electrons in their outer orbital, or shell.
The electrons in the outer shell are called “valence electrons”

3. Lewis Dot Diagrams
Lewis Dot diagrams are a way to picture the working portion of the atom – the valence electrons.
The diagrams always show ONLY the valence electrons, so may have 1, 2, 3, 4, 5, 6, 7, or 8 dots drawn.
By convention, we draw the dots in pairs, 2 at the top, the bottom, the right and the left.

4. Lewis Dot Diagrams
1) Write the element symbol. Let’s do carbon. 2) Starting at the right, draw carbon’s 4 valence electrons, counter-clockwise around the element symbol. 3) Two dots can go at the top, bottom, right, & left of the symbol. C

5. Lewis Structures
1) Check your work. 2) Using your periodic table, check that Carbon is in the 14th group. 3) You should have 4 total electrons, or dots, drawn in for Carbon. C

6. Lewis Structures
Try these elements H P Ca Ar Cl Al C

7. H Lewis Structures On your worksheet, try these elements on your own:P Ca Ar Cl Al H

8. P Lewis Structures On your worksheet, try these elements on your own:Ca Ar Cl Al P

9. Ca Lewis Structures On your worksheet, try these elements on your own:P Ca Ar Cl Al Ca

10. Ar Lewis Structures On your worksheet, try these elements on your own:P Ca Ar Cl Al Ar

11. Cl Lewis Structures On your worksheet, try these elements on your own:P Ca Ar Cl Al Cl

12. Al Lewis Structures On your worksheet, try these elements on your own:P Ca Ar Cl Al Al