9. Fluorine: Tyger Tyger, Burning Bright

Just try to tally the body count behind the periodic table’s most reactive element, and learn why it’s good for your health.

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1. Hydrogen: Close To The Sun

As we investigate our first element, we’ll meet warring balloonists, witness mass media’s first major tragedy, and see how the tiniest mistake can cost a lot of money. Plus, we’ll try to pin down where hydrogen belongs on the periodic table.

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