S1 E1: Dmitri Mendeleev | The Element Mendeleev Never Accepted

Aired: 8/18/2015 | 0:04:53 | Clip
Dmitri Mendeleev’s grasp of chemistry was so legendary that he accurately predicted the properties of three elements before they were discovered. But the "father of the Periodic Table" never accepted the properties of radium, since the idea that it glowed in the dark because it was changing into other elements flew in the face of his belief that elements were eternal.