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Vanadium - Periodic Table of Videos

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The team at periodicvideos has created a TED-Ed lesson for every element of the periodic table. This one is about vanadium -- element number 23 on the periodic table. Its different compounds are beautifully colored.

Impurities of vanadium and its neighbor, chromium, are responsible for the green color of a beautiful green gemstone. What is its name?

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