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