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11 6 Chemical Bonding Review
1. Launch: 11/6
ï⯠Grab your binder and immediately take a seat!
ï⯠Place homework (practice questions) on desk
1.⯠Draw the correct Lewis structures for the following
atoms. Be sure to use the 3-steps!
i.⯠HI
ii.⯠PH3
iii.⯠O2
2. Schedule
ï⯠We have an exam on Tuesday!
ï⯠Only today and Monday left for review.
ï⯠We donât have time to waste!
ï⯠Follow our 7 class rules
ï⯠You may not use inappropriate language
ï⯠If you have a question, ask!
4. What is the octet rule?
ï⯠The octet rule isâŠ
ï⯠all atoms want to have 8 valence electrons
ï⯠except H and He
5. Why do atoms form
chemical bonds?
ï⯠Atoms form chemical bondsâŠ
ï⯠to get 8 valence electrons (like the noble gases)
Chemical Bond
O
H H
6. What are the 3 types of bonds?
1.⯠Ionic bonds
ï⯠formed between a metal and a nonmetal
ï⯠electrons are transferred
ï⯠metal loses electron ï cation (+)
ï⯠nonmetal gains electron ï anion (â)
ï⯠stick together because electrostatic attraction
ï⯠called âsaltsâ
Cations
attracted to
neighboring
anions
7. Example #1
In an ionic bond, what ion would O form?
ï⯠Step #1: metal or nonmetal?
Metals
8. Example #1
Example: In an ionic bond, what ion would O form?
ï⯠Step #1: metal or nonmetal?
ï⯠nonmetal = anion (â)
ï⯠gain electron
9. Example #1
In an ionic bond, what ion would O form?
ï⯠Step 2: how far away from the noble gases?
2 spaces away
10. Example #1
In an ionic bond, what ion would O form?
ï⯠Step #3: write out the symbol and charge
ï⯠Step #1: anion (â)
ï⯠Step #2: 2 spaces away
2â
O
Is it a cation or an anion?
11. What are the 3 types of bonds?
2.⯠Covalent bonds
ï⯠formed between a nonmetal and a nonmetal
ï⯠electrons are shared
ï⯠2 types of covalent bonds
ï⯠non-polar: equally
ï⯠polar: unequally
12. What are the 3 types of bonds?
3.⯠Metallic bonds
ï⯠formed between a metal and a metal
ï⯠electrons are shared
ï⯠âfree in the seaâ
13. Example #2
Classify C2H4O2 as either an ionic, covalent, or metallic
compound.
ï⯠Step #1: identify the atoms
ï⯠C = carbon (X2)
ï⯠H = hydrogen (X4)
ï⯠O = oxygen (X2)
14. Example #2
Classify C2H4O2 as either an ionic, covalent, or metallic
compound.
ï⯠Step #2: metal or nonmetal?
Metals
15. Example #2
Classify C2H4O2 as either an ionic, covalent, or metallic
compound.
ï⯠Step #3: match the combination
ï⯠a nonmetal, a nonmetal, and a nonmetal
Covalent