1. Similar effect is observed in monochalcogenides of another lanthanide, thulium . 2. A relatively pure sample of thulium metal was first obtained in 1911. 3. Thulium exists as a Tm 3 + ion in solution.4. Thulium reacts with hydrogen chloride to produce hydrogen gas and thulium chloride.5. Thulium reacts with hydrogen chloride to produce hydrogen gas and thulium chloride. 6. Combination of thulium and chalcogens results in thulium chalcogenides. 7. Combination of thulium and chalcogens results in thulium chalcogenides. 8. Holmium and thulium are used in some very high power movie lighting models. 9. In this state, the thulium ion is surrounded by nine molecules of water. 10. Holmia was later found to be the holmium oxide and thulia was thulium oxide.
