The Elements and The Periodic Table activity contains two complete classroom activities. In Activity 1, students compare pre-selected data on physical and chemical properties of 14 elements and sort the elements into groups based on common properties. They then compare their classifications with groups – or families – of elements as defined by scientists. In Activity 2, students are introduced to the Periodic Table of the Elements and read about its history and organization. The reading introduces the difference between elements and compounds as well as atoms, molecules, and chemical formulas.