Neon - 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 neon, an inert gas that can be found all over the world - in neon signs.
Helium-neon lasers were the first continuous-beam lasers in commercial use and, while they have been replaced in many applications by much cheaper laser diodes, He-Ne lasers remain an important application for this element.