Pancronium, Eritronium and finally Vanadium - an element with different names. Vanadium compounds are used industrially in redox flow batteries and as catalysts. Carsten Streb presents the history of the discovery and the various applications of vanadium.

To the article about vanadium on the Fascination Chemistry website

The different colors that can arise when a vanadium solution is combined with elemental mercury is shown in the vanadium video from Periodic Videos