Thulium - Wikipedia
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 ...
Thulium - Element information, properties and uses | Periodic Table
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 Element | Uses, Facts, Physical & Chemical Characteristics
It has two allotropes: tetragonal α-Tm and the stable hexagonal β-Tm. It is ferromagnetic at temperature below 32 K and antiferromagnetic between 32 and 56 K. Thulium is paramagnetic above 56 K. Thulium has chemical symbol Tm with atomic number 69.
Facts About Thulium - Live Science
Jul 24, 2013 · Atomic Number: 69 Atomic Symbol: Tm Atomic Weight: 168.93421 Melting Point: 2,813 F (1,545 C) Boiling Point: 3,542 F (1,950 C) Word origin: Thulium is named for Thule, the earliest name for...
Thulium (Tm) - Periodic Table
Thulium is the 69th element in the periodic table and has a symbol of Tm and atomic number of 69. It has an atomic weight of 168.93422 and a mass number of 169. Thulium has sixty-nine protons and one hundred neutrons in its nucleus, and sixty-nine electrons in six shells.
Thulium - Wikiwand
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 | Rare Earth Element | Britannica - Encyclopedia Britannica
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.
WebElements Periodic Table » Thulium » the essentials
Symbol: Tm. Atomic number: 69. Relative atomic mass (Ar): 168.93422 (2) Standard state: solid at 298 K. Appearance: silvery white. Classification: Metallic. Group in periodic table: Group name: Lanthanoid. Period in periodic table: 6 (lanthanoid) Block in periodic table: f. Shell structure: 2.8.18.31.8.2. CAS Registry: 7440-30-4.
Element Name: Thulium - Periodic Table
Thulium is a chemical element; it has symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. Thulium is the second-least abundant of the lanthanides, after radioactively unstable promethium which is …
Periodic Table of Elements: Los Alamos National Laboratory
Named after Thule, the earliest name for Scandinavia. Discovered in 1879 by Cleve. Thulium occurs in small quantities along with other rare earths in a number of minerals. It is obtained commercially from monazite, which contains about 0.007% of the element.