Please turn off all downloads. You can usually pause them by clicking on them and clicking pause. Facebook
and youtube are officially banned during class time
(this is not me micromanaging, it’s a legit internet issue as told to me by OIT).
• Visit: https://checkin.ics.uci.edu/
• Log in and select Chem 1A.
• When prompted, type the word of the day: learning
• Ensure when asked if you will share your location you select “allow”.
• Visit: https://learningcatalytics.com/
• Sign in MasteringChemistry account name
When prompted, type session ID: 48463966
Remember back 5
rows of even side
are no seating zones
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Lewis Structures: non-octet breaking
3+6(1)+5=14
• BH3NH3
• Any common octet breaking atoms?
H
• How many electrons are present?
• What is the central atom?
• Draw a skeletal structure
• Add electrons: do you have enough
to give all atoms octets?
• Yes? Then minimize formal charges
if needed.
• No? Then add double bonds until
you have enough electrons.
• Label each with the formal charge.
H
B N H
H
H
H
14 electrons, everything with an octet
Lewis Structures: non-octet breaking
4+1+1+6=12
• CH2O
•
•
•
•
•
Any common octet breaking atoms?
How many electrons are present?
What is the central atom?
Draw a skeletal structure
Add electrons: do you have enough to give
all atoms octets?
• Yes? Then minimize formal charges if
needed.
• No? Then add double bonds until you have
enough electrons.
• Label each with the formal charge.
H
O
O
C
C
H
H
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H
Word of the day: learning
Ensure when asked if you will share your location you select “a
LearningCatalytics: session ID: 48463966
Lewis Structures: non-octet breaking
1+5+6*2=18e• HNO2
•
•
•
•
•
Any common octet breaking atoms?
How many electrons are present?
What is the central atom?
Draw a skeletal structure
Add electrons: do you have enough to give
all atoms octets?
• Yes? Then minimize formal charges if
needed.
• No? Then add double bonds until you have
enough electrons.
• Label each with the formal charge.
We’d need 20 electrons
to give everything octets:
N
O
Add in a double bond
O
H
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Visit: https://checkin.ics.uci.edu/
Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Lewis Structures:
non-octet breaking
• N2O
•
•
•
•
•
N N O
Short 4 electrons: need
two more bonds
Where do we add them?
5(2)+6=16 electrons
Any common octet breaking atoms?
How many electrons are present?
What is the central atom?
Draw a skeletal structure
Add electrons: do you have enough
to give all atoms octets?
• Yes? Then minimize formal charges
if needed.
• No? Then add double bonds until
you have enough electrons.
• Label each with the formal charge.
5-4=1
5-6
=-1
N N O
5-4=1
6-6
=0
5-5
=0
N N O
6-7
=-1
5-7
=-2
N N O
6-5
=1
5-4=1
OCTET BREAKING EXAMPLES
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Word of the day: learning
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LearningCatalytics: session ID: 48463966
• Which of the following statements is true:
• A) Nitrogen is allowed to have five bonds because it is allowed to have eight
electrons
• B) Phosphorous is allowed to have five bonds because it is allowed to have ten
electrons
• C) Carbon can break the octet rule with greater than eight electrons.
• D) Iodine is a halogen so it can never have more than one bond.
• E) Xenon is a noble gas so it can’t form compounds
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Lewis Structures: octet breaking
• BH3
3+1(3)=6 electrons
• Any common octet breaking atoms?
• How many electrons are present?
• What is the central atom?
H
• Draw a skeletal structure
• Add electrons: do you have enough to give all
atoms octets?
• Yes? Then minimize formal charges if needed.
H
B
• No? Then add double bonds until you have
enough electrons.
• Is it one that is typically found to have
less?
• Label each with the formal charge
H
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Lewis Structures: octet breaking
• XeF4
• Any common octet breaking atoms?
• How many electrons are present?
• What is the central atom?
8+7(4)=36 electrons
F
Xe
• Draw a skeletal structure
• Add electrons: do you have enough to give all
atoms octets?
• Yes? Then minimize formal charges if needed.
• No? Then add double bonds until you have enough
electrons.
• Is it one that is typically found to have less?
• Label each with the formal charge
F
F
F
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Word of the day: learning
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LearningCatalytics: session ID: 48463966
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
• ClF4-
Lewis Structures: octet breaking
7+7(4)+1=36 electrons
• Any common octet breaking atoms?
• How many electrons are present?
• What is the central atom?
• Draw a skeletal structure
F
Cl
• Add electrons: do you have enough to give all
atoms octets?
• Yes? Then minimize formal charges if needed.
• No? Then add double bonds until you have enough
electrons.
• Is it one that is typically found to have less?
• Label each with the formal charge
F
F
F
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Word of the day: learning
Ensure when asked if you will share your location you select “allow”.
LearningCatalytics: session ID: 48463966
Lewis Structures: octet breaking
6(5)+2=32 electrons
• H2SO4
-1
• Any common octet breaking atoms?
• How many electrons are present?
• What is the central atom?
• Draw a skeletal structure
• Add electrons: do you have enough to give all
atoms octets?
S
O
+2
-1
S
+0
+0
O
O O O O
O
H
H
H
H
• Yes? Then minimize formal charges if needed.
• No? Then add double bonds until you have
enough electrons.
• Is it one that is typically found to have
less?
• Label each with the formal charge
O
+0