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Astatine - 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. Because of its radioactivity and short half-life, astatine is an element few chemists come into contact with.

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Most of the physical properties of astatine have been estimated by interpolation or extrapolation. What do you think is the inferred color of astatine, considering that fluorine is nearly colorless, chlorine is elemental yellow, bromine is orange-brown and iodine is dark violet?

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