The Periodic Table is a chart which arranges the chemical elements in a useful, logical manner. Elements are listed in order of increasing atomic number, lined up so that elements which exhibit similar properties are arranged in the same row (Period) or column (Group) as each other. The Periodic Table is one of the most useful tools of chemistry because it helps predict the types of chemical reactions that are likely for an element. A quick glance at the table reveals a lot about the reactivit