1. Bonding Part I
Chemistry IB

2. Review Vocabulary Ion-atom with a charge
Cation-Positive ion, lost electrons
Anion-Negative ion, gained electrons
Polyatomic ion -more than one element attached to the charge.
Oxidation number -the charge that represents the number of electrons lost or gained

3. Chemical Bonds Definition-Force that holds 2 atoms together
Valence Electrons and electronegativity determine the type of bonding.
Ionic bonding- Occurs when electrons are completely transferred from one atom to another. Held together by electrostatic force. This is the strongest type of bond

4. Sodium Meets Chlorine More details and animations are here-

5. Bonding Basics
Make sure you understand valence electrons and electron configurations
Draw Dot structures of valence electrons
Know your oxidation numbers
Make sure that positive and negative charges add up to zero!

6. Practice 1
sodium and fluorine

7. Practice 2
sodium and oxygen

8. Properties of Ionic Bonds
Most ionic compounds are solid at room temperature
Dissolve in water
Conduct electricity when in the molten state or dissolved in water
Very high melting points. (strongest bond)
Examples: Acids, bases and salts
Note the crystal structure above!