Name _______________________________ Date _______ Period ___________

Directions: Use the tables to graph the following data and answer questions based on the graphs created.

1. Define effective nuclear charge and describe both the group and periodic trend.

2. Define the shielding effect and describe both the group and periodic trend.

3. Using your graph, identify and explain the group and periodic trends in atomic radius, ionization energy, electron affinity, and electronegativity.

4. What is the relationship between atomic radius and ionization energy?

5. Identify and explain 2 exceptions to the general periodic trend in ionization energy.

6. Why do group 2A, 5A, and 8A exhibit such low electron affinities?7. Which two atoms have the strongest bond? explain

a. Li and F b. Ca and O c. N and O

8. Order the following atoms by increasing atomic radius. a. N, Li, As, B b. Cl, Si, S, I, Mg9. Order the following elements by increasing ionization energy.

a. Cl, Ar b. Be, Ca c. S, Ge d. Sn, Te10. The electron affinity and ionization energy of Ar are both positive, explain the significance