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Hydrogen - 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 hydrogen and an exploding balloon. But what creates the fireball?

As the professor said in the video, some of the biggest explosions in the 20th century were hydrogen/oxygen explosions. Examples are the Chernobyl reactor explosion, the space shuttle, Challenger, disaster, and the Hindenburg zeppelin disaster. In each of these scenarios, why was hydrogen being used?

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