A
chemical element, in the
periodic table thulium has the symbol Tm and atom number 69. It is a
lanthanide.
Named after Thule, an ancient Roman name for a mythical country in the far north, perhaps Scandinavia. See also Ytterby.
External Link:
Los Alamos National Laboratory's Chemistry Division: Periodic Table - Thulium
- http://pearl1.lanl.gov/periodic/elements/69.html
Periodic Table