Chlorine - 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 chlorine - element number 17, an extremely reactive and dangerous gas, which was used as a weapon in World War I.
Chlorine is found in many common products: Sodium chloride is the salt we use to cook; bleach is a solution of sodium hypochlorite (NaClO); the main components of gastric acid are hydrochloride acid (HCl) and the salts, NaCl and KCl.
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