Manganese - 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 manganese -- element number 25 and a metal with a very rich chemistry.
Black manganese dioxide pigments have been found in cave paintings dating from up to 30,000 years ago! Manganese compounds were later used by Egyptian and Roman glassmakers. This practice continued through the Middle Ages until modern times.
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