Facts About Thulium and Actinium
Interesting Facts
- Thulium metal can resist corrosion due to dry air .
- Only Tm-169 isotope of Thulium metal occur naturally.
Actinium glows in the dark due to its radioactivity.
Sources
Found in Minerals, Mining, Ores of Minerals
Obtained by Treating Radium with Neutrons, Ores of metals
Who Discovered
Per Teodor Cleve
Friedrich Oskar Giesel
Discovery
In 1879
In 1902
Abundance In Earth's Crust