Create and share a new lesson based on this one.

About TED-Ed Selects

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

Meet The Creators

Share

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!