2930 Valence Electrons Starter Practice: Connection: Answer questions using Periodic Basics 1. What...
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Transcript of 2930 Valence Electrons Starter Practice: Connection: Answer questions using Periodic Basics 1. What...
29 30Valence Electrons
Starter
Practice:
Connection:Answer questions using Periodic Basics1. 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?
Sep 17, 2014
Glue it in
after the
notes
What do you think purpose of valence electrons are?
Valence ElectronsSep 17, 2014
Application: Work on Periodic Basic coloring andquestions
Write everything unless it is written in green!!!!
Date Lecture/ Activity/ Lab Page8/29 Syllabus /Notebook Guidelines 1-28/29 Periodic Table/ Formula 3-48/29 Tools/ Measurement 5-68/29 Lab Report/ Investigations 7-88/29 Restroom passes/Homework Log 9-109/2 Atomic Theory Research notes 11-12 9/3 Atomic Structure 13-149/4 Atomic Charges 15-16
Table of Contents
9/8 Ape Man 17-189/9 Electron Placement 19-209/10 Valence Electrons 21-229/11 Atomic Math 23-24
9/15 Periodic Table Notes 25-269/16 Periodic Basics 27-289/17 Periodic Basics II 29-30
The electrons in the outer energy level are called valence electrons
What are valence electrons?
Practice
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
Group 8 = 8 electrons
Except for He, it has 2 electrons
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3, 4, 5, 6, 7
Examples of Group Elements with the same # of valence electrons
87
Fr(223)
55
Cs132.905
37
Rb85.468
19
K39.098
11
Na22.990
3
Li6.941
1
H1.008 +
-
+
-
+++
-
-
-
+++
+++
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How many electrons do each of these atoms have in their outer
orbital/level?
What group (family) do these elements belong
to?
Highlight the outer energy level
Name of element
# valence electrons
Group #
HYDROGEN
1
1
Helium
2
18
Lithium
1
1
Nitrogen
5
15
Now Let’s Try Lewis Structures1) Find your element on the periodic
table.2) Determine the number of valence
electrons.3) 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.
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Lewis Structures1) Write the element
symbol.2) Carbon is in the 4th
group, so it has 4 valence electrons.
3) Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol.
C
Lewis Structures
C
1) Check your work.
2) Using your periodic table, check that Carbon is in the 4th group.
3) You should have 4 total electrons, or dots, drawn in for Carbon.
29 30Valence Electrons
Starter
Practice:
Connection:Answer questions using Periodic Basics1. 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.
Sep 17, 2014
Glue it in
after the
notes
What do you think purpose of valence electrons are?
Valence ElectronsSep 17, 2014
Application: Work on Periodic Basic coloring andquestions
{
Periodic Table Basics
1 ________
B2 ________
3 _________
4P = ____ N= ____ E=____
5
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.
5
Boron
(10.81)=11
5 6 5
Application:
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
Periodic Table Basics
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
3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18
Connection:Answer questions using Periodic Basics1. 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 30Valence Electrons
Starter
Practice:
Connection:Answer questions using Periodic Basics1. 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?
Sep 17, 2014
Glue it in
after the
notes
What do you think purpose of valence electrons are?
Valence ElectronsSep 17, 2014
Application: Work on Periodic Basic coloring andquestions