1. Valence Electrons and Lewis Dot Structures

2. Valence Electrons Electrons in the atom’s outermost orbitals
Usually the orbitals with the highest energy level
Look at Sulfur, it has 16 total electrons but only 6 are valence
S: 1s22s22p63s23p4
S: [Ne] 3s23p4

3. Lewis Dot Structures/ Electron Dot Structures
Consists of the element symbol, surrounded by dots
The symbol represents the nucleus and the inner electrons
The dots represent the valence electrons

4. Building an electron dot structure

5. Practice – draw electron dot structures after doing the noble gas notation
Arsenic
Cesium
Lead
Calcium
Aluminum
Iodine
Oxygen
Xenon

6. Answer the following in complete sentences
What patterns do you see? Explain.
Why does lead only have 4 valence electrons, when it has 28 electrons after the noble gas? Explain.
What does the elements symbol represent in the electron dot structure?