Introduction
This lesson will describe the periodic table.
Task
Analyze the masses of groups 1-3 through a graph to see the overall trend of the atomic masses.
Process
1. 
Label the symbol, atomic mass, and atomic number.
2. A chart that organizes elements by their______ and _______?
3. Using the periodic table provided with the link below graph the atomic mass of Groups 1-3. What is the overall trend of the masses as you go down the group.