valence electrons
DESCRIPTION
37. 38. Valence Electrons. Valence Electrons. Sep 23, 2013. Sep 23, 2013. S tarter. A pplication: Work on Periodic Basic coloring and questions. What do you think valence electrons are?. C onnection: Answer questions using Periodic Basics 1. What patterns do you see? - PowerPoint PPT PresentationTRANSCRIPT
37 38Valence 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 23, 2013
Glue it in
after the
notes
What do you think valence electrons are?
Valence ElectronsSep 23, 2013
Application: Work on Periodic Basic coloring andquestions
StarterWhat do you think valence electrons are?
Date Lecture/ Activity/ Lab Page8/28 Syllabus /Notebook Guidelines 1-28/28 Periodic Table/ Formula 3-48/28 Tools/ Measurement 5-68/28 Lab Report/ Investigations 7-88/28 Restroom passes/Homework Log 9-108/29 Safety equipment 11-128/30 Atoms Vocabulary 13-14 9/3 Atomic Theory Research notes 15-16 9/4 Observation Activity 17-18 9/5 Model Activity 19-20 9/6 Atoms Notes 21-229/9 Atomic Charges 23-249/10 APEMAN 25-269/11 Build An Atom 27-289/16 Test Corrections 29-309/18 Atomic Math and Bohr Models 31-329/19 Periodic Table Notes 33-349/20 Periodic Basics 35-369/23 Periodic Basics II 37-38
Table of Contents
37 38Valence 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 23, 2013
Glue it in
after the
notes
What do you think valence electrons are?
Valence ElectronsSep 23, 2013
Application: Work on Periodic Basic coloring andquestions
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
www.chem4kids.com
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 +
-
+
-
+++
-
-
-
+++
+++
-
-
-
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 #
37 38Valence 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 23, 2013
Glue it in
after the
notes
What do you think valence electrons are?
Valence ElectronsSep 23, 2013
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?
37 38Valence 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 23, 2013
Glue it in
after the
notes
What do you think valence electrons are?
Valence ElectronsSep 23, 2013
Application: Work on Periodic Basic coloring andquestions
Exit:Pick an element between 1-20 and make a Bohr model. Please label the protons, neutrons, and electrons.
37 38Valence 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 23, 2013
Glue it in
after the
notes
What do you think valence electrons are?
Valence ElectronsSep 23, 2013
Application: Work on Periodic Basic coloring andquestions