File:Thulium_sublimed_dendritic_and_1cm3_cube.jpg · Wikimedia Commons · See Wikimedia Commons
تولیم
Also known as Tm, element 69, 69Tm
Thulium is a chemical element; it has symbol Tm and atomic number 69. It is the thirteenth element in the lanthanide series of metals. It is the second-least abundant lanthanide in the Earth's crust, after radioactively unstable promethium. It is an easily workable metal with a bright silvery-gray luster. It is fairly soft and slowly tarnishes in air. Despite its high price and rarity, thulium is used as a dopant in solid-state lasers. It has no significant biological role and is not particularly toxic. Artificial radioactive isotopes of thulium are used as radiation sources in some portable X
AI overview
Thulium is a rare, silvery-gray metal that belongs to a special group of elements called lanthanides and is one of the least abundant of these metals in Earth's crust. Although it's expensive and scarce, thulium has practical applications in laser technology and as a radiation source in portable X-ray devices.
AI-generated from the Wikipedia summary — may contain errors.
Chemical data
- Formula
- Tm
- Molecular weight
- 168.93422 g/mol
- IUPAC name
- thulium
- SMILES
- [Tm]
- InChIKey
- FRNOGLGSGLTDKL-UHFFFAOYSA-N
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem