What is the order of the elements? Do you know the atomic mass of mercury? Is sodium a metal? Cooking is a science so why not bring science right to your kitchen with these clever SMART magnets? Don't just sit and wait for the water to boil when you can learn from your refrigerator door! These SMART Periodic Table Magnets are fun, educational, and can be used wherever you please! Size: 7.4" x 10.5" (Sheet). Gift messages may also be included on packing list.