CHEMISTRY 101 Periodic Properties of the Elements

Periodic Properties of the Elements Objectives  Analyze trends within groups and periods on the periodic table of elements. (Exploration 1)  Determine the identity of seven mystery elements based on periodic table trends. (Exploration 2) Description of Activity In this activity, a partial periodic table is provided. You will select an element and evaluate the element’s physical properties. After selecting the element, you will analyze the patterns of these properties as they occur across a period as well as trends that exist down a group. You will identify several mystery elements by investigating and interpreting periodic trends. Remember that valence electrons are defined as the electrons in an atom’s outermost orbitals, which are the electrons involved in chemical bonding. Transition metals have a tendency to form more than one cation, and the trend associated with the number of valence electrons is therefore less predictable for the transition elements. Jump Start (You may need to do some research) 1. Dmitri Mendeleev organized the periodic table according to increasing atomic mass. How is the modern periodic table organized?