eldon Unit 2: The periodic table Lesson 2: The periodic table and the atomic structure Apply 1. Classify the following elements as representative elements, transition metals or internal transition metals: a. sodium b. uranium C. chlorine d. gold e. gadolinium 2. Identify the period and the group or family to which the following elements belong: a. magnesium b. tin sodium period period period C. d. radon period uranium period e. 3. Which of the atoms in the following pairs of atoms will have the highest first ionization energy? to. Al, B b. Li, K C. B, TI d. F, N e. Ag, Rb 4. Predict the oxidation numbers for the following elements: a. calcium b. bromine c. aluminum d. nitrogen e. oxygen 5. Which element has the smallest atomic radius, strontium (Sr), silver (Ag), or rubidium (Rb)? 5. Order the elements I, Sn, Rb, Ag, and Zr in decreasing electronegativity.