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        How Elements Form Compounds

        In this video excerpt from NOVA: "Hunting the Elements," New York Times technology columnist David Pogue investigates chemical reactions involving sodium. Find out how the electron configuration of sodium, an alkali metal, makes it a highly reactive element. Meet chemist and author Theo Gray, who demonstrates two sodium reactions: a spectacular explosive reaction with water; and an exciting reaction with chlorine, a highly reactive halogen. Examine how sodium and chlorine atoms combine to form the compound sodium chloride (ordinary table salt).

        This video is available in both English and Spanish audio, along with corresponding closed captions.

        Visit the program page here.

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