29
Sep 17, 2014
Starter
Valence Electrons
What do you think purpose of
valence electrons are?
Write everything unless it is written in
green!!!!
Practice:
Glue it
in after
the
notes
Valence Electrons
30
Sep 17, 2014
Application:
Work on Periodic Basic coloring and
questions
Connection:
Answer questions using Periodic
Basics
1. What patterns do you see?
2. What do the vertical columns
have in common?
3. What do the horizontal columns
have in common?
4. What changes move across the
table from left to right?
Exit: What does the group number
tell you?
Starter
What do you think purpose of valence
electrons are?
Table of Contents
Date
8/29
8/29
8/29
8/29
8/29
9/2
9/3
9/4
9/8
9/9
9/10
9/11
9/15
9/16
9/17
Lecture/ Activity/ Lab
Syllabus /Notebook Guidelines
Periodic Table/ Formula
Tools/ Measurement
Lab Report/ Investigations
Restroom passes/Homework Log
Atomic Theory Research notes
Atomic Structure
Atomic Charges
Ape Man
Electron Placement
Valence Electrons
Atomic Math
Periodic Table Notes
Periodic Basics
Periodic Basics II
Page
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
23-24
25-26
27-28
29-30
Practice
What are
valence
electrons?

The electrons in the
outer energy level
are called valence
electrons
How do we know how many valence
electrons does an element have?
•The group number tells us how many valence
electrons are in each element.
Atoms of elements in the same group have the same
number of electrons in the outer orbitals/levels of their
atoms
Exceptions:
Transition elements (3-12)
Helium (actually has 2 valence electrons)
Group 1 = 1 electron
Group 2 = 2 electrons
www.chem4kids.com
Group 8 = 8 electrons
Except for He, it
has 2 electrons
Examples of Group Elements with the
same # of valence electrons
How many electrons do
each of these atoms
have in their outer
orbital/level?
-
1
H
1.008
+
3
Li
6.941
11
Na
22.990
-
19
K
39.098
+
37
Rb
-
+ +
-
85.468
55
Cs
132.905
87
Fr
(223)
What group (family) do
these elements belong to?
Highlight the outer energy level
Name of
element
# valence
electrons
Group #
HYDROGEN
1
1
Helium
Lithium
2
1
18
Nitrogen
5
1
15
Now Let’s Try Lewis
Structures
1)
2)
3)
Find your element on the periodic table.
Determine the number of valence electrons.
This is how many electrons you will draw.
Lewis Structures
•
•
•
Find out which
group (column) your
element is in.
This will tell you the
number of valence
electrons your
element has.
You will only draw
the valence electrons.
www.chem4kids.com
Lewis Structures
1)
2)
3)
Write the element
symbol.
Carbon is in the 4th
group, so it has 4
valence electrons.
Starting at the right,
draw 4 electrons, or
dots, counterclockwise around
the element symbol.
Lewis Structures
1)
2)
3)
Check your work.
Using your
periodic table,
check that Carbon
is in the 4th group.
You should have 4
total electrons, or
dots, drawn in for
Carbon.
Lewis Structures
On your worksheet,
try these elements on
your own:
a) H
b) P
c) Ca
d) Ar
Lewis Structures
On your
worksheet, try
these elements on
your own:
a) H
b) P
c) Ca
d) Ar
Lewis Structures
On your worksheet,
try these elements on
your own:
a) H
b) P
c) Ca
d) Ar
Lewis Structures
On your
worksheet, try
these elements on
your own:
a) H
b) P
c) Ca
d) Ar
Lewis Structures
On your worksheet,
try these elements on
your own:
a) H
b) P
c) Ca
d) Ar
29
Sep 17, 2014
Starter
Valence Electrons
What do you think purpose of
valence electrons are?
Practice:
Glue it
in after
the
notes
Valence Electrons
30
Sep 17, 2014
Application:
Work on Periodic Basic coloring and
questions
Connection:
Answer questions using Periodic
Basics
1. What patterns do you see?
2. What do the vertical columns
have in common?
3. What do the horizontal columns
have in common?
4. What changes move across the
table from left to right?
Exit: Pick an element between 1-20
and make a Bohr model. Please label
the protons, neutrons, and electrons.
Application:
Periodic Table Basics
Step 1. Complete the card for
each element.
Complete the top section for each
element by adding the element’s 1.
atomic number 2. name and 3. atomic
mass.
{
4. Determine the number of protons,
neutrons, and electrons in each
element.
5. Create a Bohr diagram for each
element.
1 ________
5
B
2Boron
________
(10.81)=11
3 _________
4
5 N= ____
6 E=____
5
P = ____
5
Periodic Table Basics
Step 2. Use color pencils to shade in the card for
each element.
 not Colored=Hydrogen
 Green= Li & Na
 Orange= B & Al
 Pink= O & S
 Red= C & Si
 Blue= Be & Mg
 Tan= N & P
 Purple= F & Cl
 Yellow= He, Ne & Ar
Step 3. Cut the cards apart and
arrange according to atomic number
in the pattern shown below on a
large sheet of construction paper.
Step 4. After you have arranged the
cards in the correct order, glue them
to the paper.
1
2
Periodic Table Basics
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Connection:
Answer questions using Periodic Basics
1. What patterns do you see?
2. What do the vertical columns have
in common?
3. What do the horizontal columns
have in common?
4. What changes move across the
table from left to right?
Exit:
Pick an element between
1-20 and make a Bohr
model. Please label the
protons, neutrons, and
electrons.
29
Sep 17, 2014
Starter
Valence Electrons
What do you think purpose of
valence electrons are?
Practice:
Glue it
in after
the
notes
Valence Electrons
30
Sep 17, 2014
Application:
Work on Periodic Basic coloring and
questions
Connection:
Answer questions using Periodic
Basics
1. What patterns do you see?
2. What do the vertical columns
have in common?
3. What do the horizontal columns
have in common?
4. What changes move across the
table from left to right?
Exit: What does the group number
tell you?