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.

Thulium (Tm), chemical element, a rare-earth metal of the lanthanide series of the periodic table. Thulium is a moderately hard, silvery white metal that is stable in air but can easily be dissolved in diluted acids—except hydrofluoric acid (HF), in which an insoluble trifluoride (TmF3) layer forms.

Thulium (pronounced as Thoo-lee-em) [2] is a soft, silver-gray rare earth metal [3] belonging to the Lanthanides group and represented by the symbol Tm [1]. While its most abundant, naturally occurring isotope is 169 Tm, it has 34 radioactive isotopes, out of which the most stable one is 171 Tm with a half-life period of 1.92 years [4] .

Element Thulium (Tm), Group 19, Atomic Number 69, f-block, Mass 168.934. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Thulium was discovered in 1879. It is slowly tarnished in air but is more resistant to oxidation than other rare earth metals. Thulium is used as radiation source in portable X-ray devices.

Thulium is a chemical element with an atomic number 69. It is the 13th element in the lanthanide series. Learn its application, properties and uses @Byju's.

Thulium is a chemical element with symbol Tm and atomic number 69. Classified as a lanthanide, Thulium is a solid at room temperature. [Xe]6s 2 4f 13. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

May 14, 2018 · Thulium is probably the rarest of the lanthanide elements. Its abundance is estimated at about 0.2 to 1 part per million in the Earth 's crust. This still makes it more abundant than silver, platinum, mercury, and gold.

Jul 2, 2024 · Thulium (Tm) is a rare earth element, part of the lanthanide series and f-block in the periodic table. Its atomic number is 69 and its element symbol is Tm. Most of the rare earths are not all that uncommon, but thulium truly is rare.

Thulium atom is a lanthanoid atom and a f-block element atom. thulium is a mineral. An element of the rare earth family of metals. It has the atomic symbol Tm, atomic number 69, and atomic weight 168.93. COD records with this CID as component. Malleable, silver …