How to Write Lewis Dot Structures

• Dot structures represent valence electrons.

• Valence electrons are electrons in the outermost energy level of an atom.

• Important for Bonding!!!

• A Trick for Drawing them!

Bohr Diagram for Sodium

1A-8A are called the Representative Elements

Column number 1A-8A indicates the number of valence electrons

Part of the reason the periodic table has the weird shape that it does is so that there is such a repeating pattern in electron configurations.

1a

2a 3a 4a 5a 6a 7a

8a

Dot Diagrams: Lithium – Neon

1a

2a 3a 4a 5a 6a 7a

8a

Start on right like a clock

Assignment: Draw Dot Diagrams for 1) Silicon, 2) Aluminum, 3) Calcium, 4) Potassium, 5) Sulfur, 6) Iodine, 7) Phosphorous and 8) Argon.

1a

2a 3a 4a 5a 6a 7a

8a