1. WARM UP
List the 3 different types of chemical bonds, and describe two characteristics of each.

2. Bonding Basics
Chemistry II

3. Lewis Dot Diagrams Show valence e- 8 e- is octet Stable
Full valence shell

4. Ionic Bonds Magnetic ions of opposing charges attract
Gained or lost e-
– (anion) or + (cation) charge
Create octet

5. Covalent Bonds Sharing unpaired e- Create octet
Both atoms get shared e-

6. Metallic Bonding Electrons “delocalized” Can move between atoms
Electrical conductivity

7. Identifying Bond Type Type of Elements Ionic: metal and non-metal
Covalent: 2 non-metals
Metallic: metals only

8. Identifying Bond Type
Electronegativity (electron affinity) difference of atoms (p. 370)
Pulling electrons……….sharing unequally
Greater pull = negative charge

9. Identifying Bond Type Ionic: 2.0 or more (full + and – charges)
Polar Covalent: 0.5 to 1.9 (slight + and –)
Pure Covalent: less than 0.5 (no charges)

10. WRAP UP
Compare and contrast ionic and covalent bonds.

11. WARM UP Draw a Lewis dot diagram for: Ca C Cl
Determine the bond type for:
NaCl PbO BF CH

12. WRAP UP
Compare and contrast polar and nonpolar covalent bonds.