1. WARM UP Write Lewis dot diagrams for:
Carbon(C) Calcium(Ca) Arsenic(As)
How many electrons would the following atoms want to gain, lose, and/or share?

2. Types of Chemical Bonds
Advanced Chemistry I

3. Ionic Bonds Made of ions + and – ions stick together
Atom creates octet by gaining or losing e-
Gain = - charge = anion
Lost = + charge = cation
+ and – ions stick together
Overall charge = 0

5. Ionic Crystals
Salts
+ and - network

6. Covalent Bonds Sharing unpaired valence e- Count for both atoms
Create octet

7. Covalent Crystals Molecules Network of bonds Connected compounds
Diamonds (3D)
Graphite (2D)
Connected compounds

8. Metallic Bonds
“Sea of e-” around atoms

9. Metallic Crystals Delocalized electrons move through crystal
Conductors
Malleable
Ductile

10. Identifying Bond Type Element type Ionic: metal and non-metal
Covalent: non-metals
Metallic: metals

11. Identifying Bond Type Electronegativity difference (pg. 370)
Ionic: 2.0 or more
Covalent: less than 2.0

12. WRAP UP
Determine the bond type for each of the following combinations…
CO2
NH3
KCl
Cu/Sn alloy
AlBr3