Assignment #15
Lewis Dot Model (Structure)
Recall
• Quickly write how to draw a Bohr model.
Recall
• Bohr models detail the energy levels
• How can you find the number of energy levels
using a periodic table?
Lewis Dot
• A Lewis Dot Model is an easy way to show
how many electrons an atoms has in an outer
energy level. Instead of drawing all of the rings
as you would with a Bohr Model
• Lewis Dot structure shows ONLY the VALENCE
ELECTRONS.
• How can you find the number of valence
electrons on the periodic table?
Lets draw the Lewis Dot Model
• 1. Write the chemical symbol or abbreviation
for the element. For example, Flourine is
F
• 2. Find the column the element is in of the
PTOE. The top of the column has a number.
For example, fluorine is
17
• 3. The last number of the column is how many
valence electrons the atom has. For example,
fluorine has
7
• 4. Now draw that number of dots around the
symbol to show how many valence electrons
fluorine has.
•F
Add to your Foldable
• Now using your new knowledge add to your
foldable!
Examples
• Please draw the Lewis Dot Model for the
following elements.
• Carbon
Bromine
Calcium
• Hydrogen
Potassium
Phosphorous
• Chlorine
Boron
Sulfur
• Oxygen
Argon
Lithium
• Silicon
Magnesium
Aluminum