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High-Speed Cameras Reveal Why Sodium Explodes in Water

You remember the sodium demo from chemistry class: Just a small chunk of the pure metal dropped into water causes a great big flash and bang. You might even remember your chemistry teacher's explanation for why. But there's always been a missing piece of the puzzle, which scientists have finally figured out using… » 1/27/15 1:20pm 1/27/15 1:20pm