The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev’s periodic table the one that has endured? Lou Serico explains via Ekaaluminium, an element whose existence Mendeelev predicted decades before it was discovered.
Tables charting the chemical elements have been around since the 19th century, but this modern version has a short video about each one: http://www.periodicvideos.com/
This interactive periodic table shows a picture that represents each element. Click on the photos to learn more: http://periodictable.com/
This interactive periodic table allows you to explore each of the elements: http://www.webelements.com/