Encyclopedia of Earth
Encyclopedia of Earth: Thulium
Information about the element, Thulium, atomic number 69. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.
TED Talks
Ted: Ted Ed: Thulium: Periodic Table of Videos
The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Thulium, element number 69, is a hard one to isolate and thus, very expensive. However, there is promise for an increased use of this...