1. Introduction to Bonding
Chemical Bonding

2. What is a Chemical Bond?
Attractive force between atoms or ions that binds them together as a unit
The bond is caused by the electromagnetic force attraction between opposite charges
May form by the attraction between a positive nucleus and a negative electrons or the attraction between a positive ion and a negative ion

3. CHEMICAL BONDING Why bond?
Atoms try to acquire particularly stable electron configuration for their outer electrons (Increase stability)
 form ions or molecules
Most stable configuration for outer electrons is noble gas configuration (octet structure)
Strategies to achieve more stable configuration:
give away electrons
accept electrons
share electrons

4. Types of Bonds:
Types of bonds:
ionic bond
covalent bond
metallic bond

5. Strength of Chemical Bonds
The strength of chemical bonds varies considerably
"strong bonds"
covalent or ionic bonds
"weak bonds"
dipole-dipole interactions and hydrogen bonding

6. CO2 NaCl Vocabulary CHEMICAL FORMULA IONIC COVALENT Formula Unit
Molecular
Formula
CO2
NaCl

7. NaNO3 NaCl Vocabulary COMPOUND 2 elements more than 2 elements Binary
Ternary
Compound
NaCl
NaNO3

8. Na+ NO3- Vocabulary ION 1 atom 2 or more atoms Monatomic Polyatomic