glue in periodic table and modeling atoms 110. complete ... · copy this on your folded periodic...
TRANSCRIPT
Ionic Bonding LT 3.notebook
1
February 09, 2013
Bell Work
• Divide a page in your composition book into 2 columns.• In one column, complete Bohr's models for elements 1, 3, and 11.• In the second column, diagram elements 4 and 12.• After you are done with the diagrams, look for patterns in the models. Look especially at the electrons since those are the particles that are involved in reactivity.
Glue in Periodic Table and Modeling Atoms 110. Complete Bell work.
Ionic Bonding LT 3.notebook
2
February 09, 2013
Learning Target 3
Pre
AssessBig Ideas
Post
Assess
I can define valence
electrons and can explain how they are involved in forming
compounds.
Valence electrons are electrons on the outermost shell of an element. They are involved in chemical reactions. They can be gained, lost, or shared.
Ionic Bonding LT 3.notebook
3
February 09, 2013
Bohr Models of elements 120. What is the pattern?
Ionic Bonding LT 3.notebook
4
February 09, 2013
Valence ElectronsCopy this on your folded periodic table.
Valence electrons are electrons on the outermost electron shell of an atom.
Valence electrons are responsible for chemical reactions!
The number of valence electrons determines whether an atom of an element will lose, gain, or share electrons in a chemical reaction.
Ionic Bonding LT 3.notebook
5
February 09, 2013
formative assessment
http://www.middleschoolscience.com/periodictableshellsvalence.pdf
Determining Valence Electrons Worksheet
Ionic Bonding LT 3.notebook
6
February 09, 2013
Periodic Table
Study Guide
Determining Shells and Valence
Electrons
5th Grade Science
Mrs. LaRosa
www.middleschoolscience.com 2008
All images are from www.Chem4kids.com
Ionic Bonding LT 3.notebook
7
February 09, 2013
Periods • Each row is called a “period”
1st Period = 1 Shell
2nd Period = 2 Shells3rd Period = 3 Shells
4th Period = 4 Shells
• The elements in each period have the same number of shells
www.chem4kids.com
Ionic Bonding LT 3.notebook
8
February 09, 2013
Groups• Each column is called a “group”
• Each element in a group has the same number of electrons in their outer orbital, also known as “shells”.
Group 1 = 1 electronGroup 2 = 2 electronsGroup 8 = 8 electrons
Except for He, it has 2 electrons
• The electrons in the outer shell are called “valence electrons”
www.chem4kids.com
3, 4, 5, 6, 7
Ionic Bonding LT 3.notebook
9
February 09, 2013
Transition Metals• Transition Metals have slightly different rules for shells and valence electrons.
• This is something you will learn about in High School Chemistry.
www.chem4kids.com
Ionic Bonding LT 3.notebook
10
February 09, 2013
Determine the number of shells and the number of valence electrons for:
Carbon C2nd Period = 2 shells
4th Group =
4 valence
electrons
www.chem4kids.com
Ionic Bonding LT 3.notebook
11
February 09, 2013
Determine the number of shells and the number of valence electrons for:
Sodium Na3rd Period = 3 shells
1st Group =
1 valence
electron
www.chem4kids.com
Ionic Bonding LT 3.notebook
12
February 09, 2013
Write your answers on your handout.
NName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
13
February 09, 2013
Write your answers on your handout.
NName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
14
February 09, 2013
Write your answers on your handout.
Ne
8th Group = 8 valence
electrons
2nd Period = 2 shells
Neon
Name the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
15
February 09, 2013
Write your answers on your handout.
HName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
16
February 09, 2013
Write your answers on your handout.
H1st Group = 1 valence
electron
1st Period = 1 shell
HydrogenName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
17
February 09, 2013
Write your answers on your handout.
Be
2nd Group = 2 valence
electrons
2nd Period = 2 shells
BerylliumName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
18
February 09, 2013
Write your answers on your handout.
SName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
19
February 09, 2013
Write your answers on your handout.S
6th Group = 6 valence
electrons
3rd Period = 3 shells
SulfurName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
20
February 09, 2013
Write your answers on your handout.
KName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
21
February 09, 2013
Write your answers on your handout.
K
1st Group = 1 valence
electron
4th Period = 4 shells
PotassiumName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
22
February 09, 2013
Write your answers on your handout.
HName the element.
Number of shells ?
Valence electrons ?
Ionic Bonding LT 3.notebook
23
February 09, 2013
Write your answers on your handout.
He
8th Group = 2 valence
electrons
1st Period = 1 shell
HeliumName the element.
Number of shells ?
Valence electrons ?• Helium is the exception in Group 8.
• Since it has just one shell, that shell can only fit 2 electrons instead of 8.
• It is in this group because all the elements have a full outer shell.