Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and antepenultimate (third-last) element in the lanthanide series.
What's in a name? From the earliest name for Scandinavia, Thule. Say what? Thulium is pronounced as THOO-lee-em. History and Uses: Thulium was discovered by Per ...
Appearance and Characteristics. Harmful effects: Thulium is considered to be non-toxic. Characteristics: Thulium is a bright, soft, malleable, silvery-gray metal.
Thulium is the least abundant of the earth elements, and is about as rare as silver, gold, or cadmium. The pure metal has a bright, silvery lustre.
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 thu·li·um (thōō'lē-əm, thyōō'-) n. Symbol Tm A rare-earth element having an x-ray emitting isotope that is used in small portable medical x-ray units.
Name: Thulium: Symbol: Tm: Atomic Number: 69: Atomic Mass: 168.934 atomic mass unit: Number of Protons: 69: Number of Neutrons: 100: Number of Electrons: 69: Melting ...
Thulium (Tm), thulium RTC chemical element, a rare-earth metal of the lanthanide series of the periodic table. Thulium is a moderately hard, silvery white metal that ...
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