1. Ionization Energies Cornell Notes

2. Purpose To learn about Ionization Energies

3. Concepts learned Ionization Energies Go Up As you move across the periodic table from left to right Ionization Energies Sharply Decrease as you move down a period, for example moving from He in group 8 back down to Li in Group 1

5. Examples of Evidence Evidence #1: According to the attached graph, we found that the lowest ionization energies were at H, Li, Na, K, Rb and Cs These are all at the beginning of the periodic table in the first group Evidence #2: The highest energies were at He, Ne, Ar, Kr, Xe and Rn These are all at the end of the periodic table in the last group

6. This proves… The first concept learned: Ionization Energies Go Up as you move across the periods on the periodic table

7. Evidence Evidence #1: According to the attached graph, there is a zig-zag pattern. For example, the first period which includes H to He goes up dramatically and then drops again at Li Evidence #2: Li goes up again until Ne and then drops dramatically again at Na.

8. This proves That ionization Energies Sharply decreases as you move down to the next period