1. Understanding the Periodic Table
Key Questions:
What does atomic structure have to do with the periodic table?

2. Each element in a Period (row) has the same number of energy levels (shells).

4. Groups
Each Group (column) of elements has the same number of valence electrons (electrons in the outer shell).

5. Families
Elements are divided up into families based on their chemical properties and how they react with the outside world.

6. What are Valence Electrons?
Lithium atom
Helium atom
Two
valence electrons
One
valence electron

7. What does atomic structure have to do with the periodic table?
Elements are arranged in the periodic table based on both their chemical and physical properties.

8. Energy Levels, Shells and Orbitals
Energy Level (Principal Quantum Number)
Shell Letter
Maximum Electron Capacity
Suborbitals 1 K 2 s2 L 8
s2,p6 3 M 18
s2,p6,d10 4 N 32
s2,p6,d10,f14 5 O 6 P 7 Q

9. Resources