1. Ionic Bonds
Chapter 14

2. Valence Electrons
Valence electrons are the electrons in the highest occupied energy level of an element’s atoms.

3. Valence Electrons/Electron Dot Diagrams
The number of valence electrons largely determines the chemical properties of an element.
Electron dot structures – show valence electrons as dots.

4. Cations and Electron Configurations
Octet rule – atoms in compounds tend to have the electron configuration of a noble gas.
Remember: a cation is any atom or group of atoms with a positive charge.
Most common cations are those formed when a metal loses valence electrons.

5. Anions and Electron Configurations
Remember: when an atom of an element gains and electron it becomes an anion.
example: Chlorine (Cl)

6. Writing Ions
When oxygen becomes an ion by gaining two valence electrons (ionization) we would write that ion as O2-

7. Ionic Compounds
The forces of attraction that bind oppositely charged ions together are called ionic bonds.
Example: Na + Cl
Example: Al + Br

8. In Closing Pg. 388: 18-15 due next Wednesday (4/9)
Quiz next Wednesday (4/9) over