Encyclopedia of Earth
Encyclopedia of Earth: Thorium
Information about the element, Thorium, atomic number 90. Covers physical properties, atomic properties, how abundant it is on the Earth, where it is found, and details about health-related regulations. Discusses thorium's potential use...
TED Talks
Ted: Ted Ed: Thorium: Periodic Table of Videos
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. [0:37]