Get to know each element by its character (name, atomic number, mass, impressively silly illustration) as you play Periodyx, the game that uses all 118 chemical elements. Can you collect ten elements in your hand? (It probably depends on the element.) Can you get rid of all your elements? (Well, no; matter can't be created or destroyed. But you know what we mean.) The properties of the elements are key—the better you know them, the shorter your path to victory.