Correction: one chemist claims to have found it. Thus far, there has been no peer-review of his work. One wonders if this gentleman will wind up as the next Fleischman and Pons, creators of "cold fusion" (their device would have made a pretty good battery, if palladium weren't so rare and expensive)...
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Sodium is a metal that reacts explosively when exposed to water. Chlorine is a gas that'll kill you dead in moments. Together they make my fries taste good.