Test your Periodic Table trivia with this deck of 48 fact-filled cards. Each laminated card measure 3¼x 4 and has a question on the front side with the answer and short explanation on the reverse. Questions are multiple choice, true/false, and short answer, and they ask general questions about the elements and the Periodic Table. Use these to review concepts, prepare for tests or just to test your knowledge on the subject. How much do you already know What are valence electrons? Which element group on the Periodic Table is highly reactive and includes metals or metalloids? How many elements are there?