Lewis Structures 2016.notebook
December 21, 2016
Do Now
Do Now
1. If Magnesium became an ion, would it gain or lose electrons? How many?
2. What is the electron configuration for the magnesium atom?
https://www.youtube.com/watch?v=ji_25I_q4LQ
https://www.angelo.edu/faculty/kboudrea/demos/sodium_chlorine/
sodium_chlorine.htm
3. What is the electron configuration for the magnesium ion?
https://www.youtube.com/watch?v=ji_25I_q4LQ
Nov 28­4:16 PM
Nov 28­4:16 PM
Lewis Dot Diagrams (L.D.D)
Lewis Dot Diagrams
• L.D.D: a diagram that represents the outermost
electrons of an atom or ion (valence e‐)
• Ex:
Aim: To draw the lewis dot diagram for an element or an ion.
Strontium
Sulfur
Sr
S
2‐8‐18‐8‐2
Nov 28­4:16 PM
2‐8‐6
Nov 28­4:16 PM
1
Lewis Structures 2016.notebook
December 21, 2016
Drawing Lewis Structures
Practice
1) Draw the atomic symbol.
Draw:
A) Calcium
B) Iodine
2) Look up the # of valence e‐, this is the # of dots to draw.
3) Fill Order:
12
5
8
X
4
7
3 Draw 2 e‐ on top then fill in
1 e‐ at a time going
6 clockwise.
Example: Phosphorus
*No more than 2
dots on any side
of the symbol*
P
2‐8‐5
Nov 28­4:16 PM
Nov 28­4:16 PM
Draw Lewis structures for the following atoms.
1) F
8) He
15)
O
2) P
9) Mg
16)
Ba
3) Ca
10) S
17)
Al
11) Li
18)
H
4)
N
5) Fe
12) Zn
19)
Xe
6) Ar
13)
C
20)
Cu
7) K
14)
I
Nov 28­4:16 PM
Draw Lewis structures for the following ions and atoms.
1. calcium cation
6. carbon anion
2. potassium cation
2. helium atom
3. argon
3. oxygen anion
4. aluminum cation
4. phosphorus anion
5. bromine anion
5. hydrogen anion
Nov 28­4:16 PM
2