Select a puzzle option to scramble the elements in a family. Then test your knowledge by dragging each element to its proper location in the table.
When you can't find the location for an element, press the "Solve" or "Solve All" buttons.
Use the Table Shading control to shade the table according to the values of the physical or chemical properties of the elements.

Did you ever think of the periodic table as a seating chart for an Atomic Amusement Park ride?
See BPReid's Remarks on Chemical Change.