part i t. trimpe 2008 . update your table of contents write your homework – leave it out to be...
TRANSCRIPT
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PART IT. Trimpe 2008 http://sciencespot.net/
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Update your Table of Contents Write your homework – leave it out to be stamped Get your Element Properties homework out to be
checked Get your graded Mythbusters Quiz off the front
counter and tape it onto page 20 of your notebook! Complete your Element Review Square & KEEP IT
SOMEWHERE SAFE, YOU WILL USE IT AGAIN AT THE END OF CLASS & IT WILL GET TURNED IN!
WARM UP:
Date Session#
Activity Page#
9/29-9/30
13 Bonding Basics Note Guide 23
Homework - Ion “Cheater” Chart 24
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Bonding is an example of a chemical change
Bonding occurs when 2 or more atoms are chemically joined
When 2 or more atoms bond that is called a molecule
A molecule that contains 2 or more elements is called a compound
Bonding Basics
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VALENCE ELECTRONS =the electrons on the outer (valence) shell of an atom
REVIEW: Bonding is ALL about….
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Valence Electrons:1
7
2 6543
8
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There are 2 ways to represent the # of
Electrons:
Bohr Diagram Lewis Dot
Shows ALL electrons
Shows ONLY valence electrons
O
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The first shell holds2electrons.
After the 1st shell, each shell needs8 electrons to be full and STABLE/HAPPY!
How many electrons makes the valence shell full or stable/“happy”?
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The Octet Rule Atoms give away or steal electrons in order to happy and stable with a full valence shell!
◦Atoms with less than 4 valence electrons tend to lose electrons.
◦Atoms with more than 4 valence electrons tend to gain electrons.
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What about an element like carbon?◦Carbon has 4 valence electrons, so what will it do? BOTH!
◦The fact that carbon has 4 valence electronsallows it to bond withmany elements!
EXAMPLES…
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Atoms give away or steal electrons in order to be STABLE/HAPPY with a full valence shell!
REMEMBER: When an atom gains or loses electrons it becomes a charged ____________________
Reminder:
Ion (cation or anion)
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Remember…ION = an atom with a charge because it
loses or gains one or more electrons.
Positive ion=cationloses electrons
(now has more positive particles than negative)
Negative ion=anion gains electrons
(now has more negative particles than positive)
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Here are 2 elements that have a few extra electrons. What do they want to do?
EXAMPLES…
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Here are 2 elements that are missing a few electrons. What do they want to do?
EXAMPLES…
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We have Sodium (Na) who has an extra electron, and Fluorine (F) who is looking for an electron SO…
They end up bonding so they can both be happy!
EXAMPLES…
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Fill in the electron table using your periodic table…if you got that move on to the back!
Let’s Try It!
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Element Element Symbol
Atomic Number
Total # of Electrons
# of Valence
Electrons
# of Electrons Gained or
Lost
Overall Charge
(+/-)
Chlorine
Potassium
Magnesium
Fluorine
Aluminum
Carbon
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Atomic # =
Atomic Mass =
# of Protons =
# of Neutrons =
# of Electrons =
Cation/Anion =
Atomic # =
Atomic Mass =
# of Protons =
# of Neutrons =
# of Electrons =
Ion Symbol =
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PART 2T. Trimpe 2008 http://sciencespot.net/
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Ionic Bonds
Covalent Bonds
Two Types of Chemical Bonds
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Atoms will ____________ one or more electrons to another atom to form the bond.
Each atom is left with a ________________ valence shell.
An ionic bond forms between a ___________ion with a positive charge and a ________________ ion with a negative charge.
Ionic Bonds
COMPLETE
TRANSFER
METAL
NONMETAL
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Ionic Bonds
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Ionic Bonds
Li F
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Atoms ___________ one or more electrons with each other to form the bond.
Each atom is left with a ________________ valence shell.
A covalent bond forms between two ________________.
Covalent BondsSHARE
COMPLETE
NONMETALS
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Covalent Bonds
=
=
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Covalent Bonds
H HO
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Ionic or Covalent Bond?
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Ionic or Covalent Bond?
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Ionic or Covalent Bond?
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Ionic or Covalent Bond?
Bromine Iodine
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Ionic or Covalent Bond?
Calcium Chlorine
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Song to review
We’re Bringing Atoms Back…
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ON THE BACK OF YOUR ELEMENT SQUARE WARM-UP NUMBER 1-10
Leave a little space between questions #3 and #4
Make sure your name & block are on it somewhere!
Bonding Mini Quiz!
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1. After the first shell, each electron shell needs how many electrons to be stable/“happy” and complete?
A. 8B. 2C. 4D. 18
Bonding Quiz:
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2. The picture below is a Bohr diagram of an Oxygen (O) atom. Which of the following is TRUE about Bohr diagrams?
A. The Bohr diagram shows ONLYvalence electrons.
B. The Bohr diagram shows ALL electrons, not just valence electrons.
C. The Bohr diagram shows ONLY protons.
D. The Bohr diagram shows ONLY neutrons.
Bonding Quiz:
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3. Draw the Lewis Dot diagram for Oxygen (O):
Bonding Quiz:
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4. How many valence electrons does Neon (Ne) have?
A. 5B. 4C. 8D. 1
Bonding Quiz:
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5.Sodium (Na) is stable/“happy” because it has a full valence shell.
A. TrueB. False
Bonding Quiz:
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6. Which type of bond is between a metal and a nonmetal?
A. Covalent
B. Ionic
Bonding Quiz:
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7. ____________ bonds involve transferring electrons to be stable/“happy” or complete.
A. Ionic
B. Covalent
Bonding Quiz:
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8. A _______________ bond is between two or more nonmetals and involves sharing electrons.
A. Ionic
B. Covalent
Bonding Quiz:
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9. Which of the following is an example of a covalent bond?
A. NaClB. LiFC. CaOD. CO2
Bonding Quiz:
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10. Which of the following is an example of an ionic bond?
A. NF3
B. NaClC. CF4
D. CO2
Bonding Quiz:
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Group/Family Name
Alkali Metals
Alkaline Metals
Boron Family
Carbon Family
Nitrogen Family
Oxygen Family
Halogens Noble Gases
Group/Family Number
1
# of Valence Electrons
1
# of empty spaces for electrons
7
Giver or Stealer of electrons
Giver
Type of ion formed
Cation
Charge of ion formed
+1
Group # they bond with
7
Complete your Ion “Cheater” Chart
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Bonding Raps http://www.youtube.com/watch?
v=Xaoy94mx2EU
https://www.youtube.com/watch?v=wWUYHHo-zB0
Student Created Bonding Videos