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Thorium - 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. Thorium is element number 90 on the periodic table.

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Additional Resources for you to Explore
For all the basics about thorium, check out the Visual Elements Periodic Table.
For amazing photos and facts about thorium, check out The Elements by Theodore Gray.
Thorium oxide was used in mantles in 19th century gas lights. Also other compounds of this radioactive element were even used in toothpaste sold in Germany during World War II!

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TED-Ed Selects are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

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