1. Chem
Get packet from before break stamped if you did not do so (naming all compounds).
You can still do corrections for Unit 8 (periodic table)
Today:
Review of ionic/covalent compound naming
Covalent Compound Lewis Structures
Unit 9 Test next Wed 4/18 (A), Th 4/19 (B)

2. 2 or more nonmetals Use prefixes Metal and a nonmetal
Ionic
Covalent
Metal and a nonmetal
Charges must be balanced to add up to 0
NO PREFIXES
Roman Numerals for Transition Metals indicate the charge
Watch out for polyatomic ions!
2 or more nonmetals
Use prefixes

3. Forming Bonds
Bond= a region that forms when electrons from different atoms interact with each other
The attraction between 2 or more atoms allows for the formation of a compound.
Only valence electrons participate in bonding
Octet Rule
Atoms bond in order to get a full valence shell, or 8 valence electrons
Exceptions:
Hydrogen is happy with 2 valence electrons
Boron is happy with 6 valence electrons

4. Covalent Bonds
A covalent compound is one that is made up of 2 or more nonmetals
A covalent bond involves the sharing of electrons
Lewis Structures
Show just the valence electrons

5. Remember: The group (vertical column) the element is in gives you information about the number of valence electrons it has!

6. O 1 6 H H

7. O 1 6 H 2 8 H

8. Lewis Structures Lab
Get stamped!