The Mystery of Matter

Unruly Elements

Episode 2 | 53m 50s

Dmitri Mendeleev invents the Periodic Table, bringing order to the elements. This order is shattered when Marie Curie discovers radioactivity, revealing that elements can change identities —and atoms contain undiscovered parts.

Aired: 08/19/15

Expired: 08/31/17

Rating: TV-PG

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