Outcomes: The student will
1. locate data on the Web ionization energy
2. prepare data table
3. graph data
4 analyze data
5. search for trends within groups and periods
6. search for explanations of the trends observed
Procedure:
1. Divide class into teams of three or four members
2. Look up the definitions of ionization energy, atomic volume or radius, and atomic mass
3. From a beaker containing the following slips of paper (Ionization energy,atomic volume or radius, and atomic mass ) draw one per member.
4. Each team member uses the internet to locate assigned data for elements 1-56. (4 alternate. If the team is larger than four, the tasks could be divided : Each member of the team locates the information for the elements in one metal group and one non-metal group and compiles the data for elements of atomic numbers 1-56.)
5. prepare a data table of assigned characteristic and atomic number (use a graphing program if possible)
Analysis
6. prepare a graph of "assigned characteristic vs atomic number." Be sure the points are connected dot to dot
7. Use a black marker to draw distinct VERTICAL lines at the end of each PERIOD. (Elements found in each period are thus set apart)
8. Select 8 colored pencils or markers. Assign one color to each GROUP or FAMILY (IA-VIIIA). Create a Key. Now Connect the points of each member of the group/family in the assigned color.
Interpretation
9. With Team members, search the characteristic graphs for any simple trends in the periods. With Team members, search the characteristic graphs for any simple trends in the families. These may be as simple as noting a general increase or decrease. Create a summary papragraph for the trends noted for each characteristic.
10. Use text and reference resources to search for explanations of these trends. Include these explanations in your summary section.