Periodic Table of the Elements. 1000 piece puzzle. 26.5 x 19.25 inches. Contains the name, symbol, atomic number, atomic weight and electronic configuration of each element. This cornerstone of the academic discipline of chemistry has found wide application in physics, biology, engineering and industry. This superior quality puzzle will delight and educate all at the same time. Strong high - quality pieces that won't break. Easy fit puzzle pieces. Made from recycled board.