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
Thulium | Rare Earth Element | 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
Thulium Facts, Symbol, Discovery, Properties, Uses - Chemistry Learner 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]
Thulium - Encyclopedia. com 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
Thulium Facts – Element Tm or Atomic Number 69 - Science Notes and . . . 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: Rare Earth Element with Specialized Applications Discover the fascinating world of Thulium, a rare-earth element with the atomic number 69 Learn about its unique physical and chemical properties, its specialized industrial and medical applications, and its significance in modern technology
Thulium Element Facts Chemistry - chemicool. com Thulium is a bright, soft, malleable, silvery-gray metal It is a rare earth metal and is one of the least abundant The metal tarnishes slowly in dry air to form the oxide and reacts with water to form the hydroxide and hydrogen gas
Periodic Table of Elements: Los Alamos National Laboratory Thulium is the least abundant of the rare earth elements, but with new sources recently discovered, it is now considered to be about as rare as silver, gold, or cadmium Thulium can be isolated by reduction of the oxide with lanthanum metal or by calcium reduction of a closed container
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