Ho with a very long half life period. The chemical symbol for Thulium is Tm.. Atomic Mass of Thulium. Atomic number of thulium is 69. Atomic number: 69: Group numbers: 3: Period: 6: Electronic configuration: [Xe] 4f 13 6s 2: Formal oxidation number: +3: Electronegativities: 1.25: Atomic radius / pm: 172.4: Relative atomic mass: 168.934 22(2) Thulium was discovered by Per Theodore Cleve (SE) in 1879. Connected lines with dots. Atomic Number: 69: Atomic Radius: 227 pm (Van der Waals) Atomic Symbol: Tm: Melting Point: 1545 °C: Atomic Weight: 168.9: Boiling Point: 1950 °C: Electron Configuration: [Xe]6s 2 4f 13: Oxidation States: 2, 3 (a basic oxide) History. Group Number: none. Jeden Tag werden Tausende neue, hochwertige Bilder hinzugefügt. It's one of the rare earths, elements that are largely misnamed as they are quite common. Nuclides / Isotopes; Potential Parent Nuclides. Atomic structure of Thulium includes atomic number, atomic weight, electron configuration Overview of Thulium; Thulium's Name in Other Languages; Atomic Structure of Thulium; Chemical Properties of Thulium; Physical Properties of Thulium; Regulatory / Health; Who/When/Where/How. British chemist Charles James was the first chemist who obtained pure thulium. Its first ionization energy is 596.7 kJ.mol-1. Reaction is given below –, Reaction with water – It undergoes hydrolysis with cold water and hot water both. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z . 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f13 5d0 6s2 or [Xe] 4f13 6s2. Another new substance was green in color and was oxide of another new unknown element. Although insoluble thulium salts are completely nontoxic. It is fairly soft and slowly tarnishes in air. Alpha thulium has tetragonal shape while beta thulium has hexagonal shape. Jump to navigation Jump to search thulium element with the atomic number of 69. Reactions are given below –, It dissolves in dilute sulfuric acid and forms a pale green solution containing Tm. 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 Page Two. – kaufen Sie diese Illustration und finden Sie ähnliche Illustrationen auf Adobe Stock 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. Period Number: 6. Group Name: Lanthanide. en: Thulium ... element with the atomic number of 69. English Translation for thulium - dict.cc Greek-English Dictionary Hydrogen is a chemical element with atomic number 1 ... Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. It's atomic number 69. Thulium Menu. Thulium is an expensive and least abundant rare earth metal. Thulium, symbol Tm, has a Simple Hexagonal structure and Silver color. The lanthanoids are found in nature in a number of minerals. Symbol of the thulium element is Tm. Mendelevium which is a member of the actinide series is placed below thulium in the periodic table. It is a Lanthanide metal. Its electronic configuration is 1s. Tm; atomic number 69; metallic element; metal Verwante definities voor "thulium": a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime 1 Named after Thule, the earliest name for Scandinavia. Number of protons in Thulium is 69. Thulium (Tm) is a silvery coloured metal that has the atomic number 69 in the periodic table. Thulium chemical element. It is ductile and shows resistance to corrosion. In soil its occurrence is 0.5 parts per million. Other synthetic isotopes such as thulium – 167, thulium – 168, thulium – 170 have half - life periods of 9.25 days, 93.1 days and 128.6 days respectively. Twenty five isotopes are known, with atomic masses ranging from 152 to 176. Atomic Number of Thulium is 69. So, it has a few applications. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. 69 Tm Thulium 168.93422. The isotopes of thulium range in atomic weight from 145.966 u (Tm-146) to 176.949 u (Tm-177). Atomic Mass of Thallium Atomic mass of Thallium is 204.3833 u. Thulium Page One. Thulium is a chemical element which is a member of the Lanthanide series and is placed in the 6. period. Thule ’ which is a shiny metal of slivery color, he obtained two new when! N. Chem 69 in the thirteenth element in the 6th period, ) it reacts with halogens plays! Or ingestion of thulium is a silvery grey appearance and it is a chemical element with mineral... 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