What is the order of the elements? Do you know the atomic mass of mercury? Is sodium a metal? How about fluoride? Cooking is a science so why not bring science right to your kitchen with these clever 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 like poetry fridge magnets, but with chemistry. Fun, educational, and can be used wherever you please! Size: 7.4″ x 10.5″ (Sheet).