Consider two hypothetical elements, W and Z. Element W has an electron affinity of ?150 kJ/mol, and element Z has an electron affinity of ?38 kJ/mol.
• a. If you have a W? ion and a Z? ion, from which ion would it require more energy to remove an electron? Explain your answer.
• b. If elements W and Z are in the same period of the periodic table, which atom would you expect to have the greater atomic radius? Why?
• c. Assuming that the elements are in the same period, which element would you expect to have the smaller first ionization energy?
• d. Do the valence electrons in element Z feel a greater effective nuclear charge than those in element W? Explain how you arrived at your answer.