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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2. Helium: Above All That

This week, we try to interact with helium, even though it really doesn’t want to. Plus, we explore the occult side of chemistry, as described by the theosophists.

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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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