At 32 K, it shows ferromagnetic character while at 32 56 K, it shows antiferromagnetic properties. It is the least abundant of the rare earths and its metal is easy to work. Name Origin From Thule ancient name of Scandinavia. Thulium (Tm) Atomic Data for Thulium (Tm) Atomic Number = 69 Atomic Weight = 168.93421 Reference E95 : Isotope : Mass : Abundance : Spin : Mag Moment : 169 Tm: 168.93421: 100%: 1/2-0.2316: Tm I Ground State (1s 2 2s 2 2p 6 3s 2 3p 6 3d 1 0 4s 2 4p 6 4d 1 0 5s 2 5p 6)4f 1 3 6s 2 2 F . It's atomic number 69. This website does not use any proprietary data. All isotopes of thulium are either radioactive or, in the case of 169Tm, observationally stable, meaning that 169Tm is predicted to be radioactive but no actual decay has been observed. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds; because it . It also has some corrosion resistance in dry air and good ductility. Thulium Atomic Number and Electronic Configuration, It is the least abundant rare earth metal. Possible oxidation states are +3. CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hunds Rule. World production is about 50 tonnes per year as thulium oxide. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. Phone: +971 4 429 5853 e-mail: info@lenntech.com, Copyright 1998-2022 Lenntech B.V. All rights reserved, Plant Inspection & Process Optimalisation, Separation and Concentration Purification Request. Atomic Number: 70: 69 . Thulium is a chemical element with atomic number 69 which means there are 69 protons in its nucleus. The symmetry properties of the crystal are described by the concept of space groups. Complete ground state electronic configuration for the Thulium atom, Unabbreviated electronic configuration, 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f13 6s2. It is a metal which is traditionally considered to be one of the rare earth metals. Thulium is a chemical element with symbol Tm and atomic number 69. Relative atomic mass Mass percent (%) 169 Tm: 168. . The melting point of thulium is 1818 degrees Kelvin or 1545.85 degrees Celsius or degrees Celsius. . The chemical symbol for thulium is Tm. It also has some corrosion resistance in dry air and good ductility. Another way to read periodic table and locate an element is by using group number (column) and period number (row). As thulium has a total of 69 protons. Tm - Thulium Atomic Number: 69 Period Number:6 Group Number: None Thulium is a bright silvery-gray metal, which belongs to lanthanide series. Kwike.png 201 202; 12 KB. Mendelevium which is a member of the actinide series is placed below thulium in the periodic table. Thulium is a chemical element which is a member of the Lanthanide series and is placed in the 6th period. The element is never found in nature in pure form but it is found in small quantities in minerals with other rare earths. Like other lanthanides, thulium most commonly shows a +3 oxidation number or state but the +2 oxidation state of the metal is also stable. 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. Per Teodor Cleve named this unknown new element thulium and its oxide thulia. Refer to table below for Ionization energies of Thulium, Refer to below table for Thulium Physical Properties, Thulium is Conductor of electricity. Note that each element may contain more isotopes. It has two major allotropes - alpha thulium and beta thulium. Thulium is a chemical element with symbol Tm and atomic number 69. 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. Mendelevium which is a member of the actinide series is placed below thulium in the periodic table. Symbol of the thulium element is Tm. The Standard English unit ispounds mass per cubic foot(lbm/ft3). It is used as an X ray source. These types of X-ray devices are used in medical and dental diagnosis. The metal is obtained by reducing the anhydrous fluoride with calcium, or reducing the oxide with lanthanum. The thulium atom has a radius of 176 pm and a Van der Waals radius of 227 pm. It corresponds to the charge number of the nucleus. In these reactions of thulium with halogens temperature plays a key role. Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. Electrical: 0.015 10 6 /cm . Thulium (Tm) is a chemical element of the periodic table, located in the period 6, and has the atomic number 69. It is the thirteenth and third-last element in the lanthanide series. There are two reasons for the difference between mass number and isotopic mass, known as themass defect: The atomic mass number determines especially the atomic mass of atoms. Our Website follows all legal requirements to protect your privacy. Thulium is not found in pure elemental form in nature as it is a least abundant rare earth metal. "Atomic weights of the elements 2013 (IUPAC Technical Report)", "Atomic weights of the elements. Reaction is given below , Reaction with halides It reacts with halogens and forms thulium halides. The chief ores are in China, US, Brazil, India, Sri lanka and Australia. So, it has a few applications. Natural thulium consists of one stable isotope, Tm-169. . Description: Silver colored rare earth metal that tarnishes in air and reacts with water. It exists in concentrations of 1 part per trillion by moles in the solar system. . Bohr Atomic Model of Thulium - Electrons per energy level. The researchers on February 2, 2004, stated in Physical Review C that they bombarded americium-243 with calcium-48 ions to produce four atoms . This is approximately the sum of the number of protons and neutrons in the nucleus. Our Periodic Element comparison tool allows you to compare Periodic Elements properties side by side for all 118 elements | SchoolMyKids Interactive Dynamic Periodic Table of elements . The number of electrons in each of Thulium's shells is [2, 8, 18, 31, 8, 2] and its electron configuration is [Xe]4f 13 6s 2. Formal oxidation number: +3: Electronegativities: 1.25: Atomic radius / pm: 172.4: Relative atomic mass: . 2) You may not distribute or commercially exploit the content, especially on another website. For every kg of earths crust its occurrence is 500 micrograms. Discovery: This rare earth was discovered by Sweedish chemist Per Teodor Cleve in 1879. Know everything about Thulium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure. The deposits in India are particularly rich in monazite. Thulium occurs in small quantities along with other rare earths in a number of minerals. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it. # Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN). Atomic Mass 168,93421 Learn more about the atomic mass. Note that, these points are associated with the standard atmospheric pressure. For example, thulium fluoride is white in color while thulium iodide is yellow in color. The Crystal structure can be described in terms of its unit Cell. It has a silvery grey appearance and it's not a hard metal. Electron Configuration and Oxidation States of Thulium. It is extracted by ion exchange and solvent extraction. Boiling Point: 2220 K 1947 C 3537 F. Coefficient of lineal thermal expansion /K-1: 13.3E -6. For every kg of earths crust its occurrence is 500 micrograms. Electron configuration of Thulium is [Xe] 4f13 6s2. It has the atomic symbol Tm, atomic number 69, and atomic weight 168.93. Thulium oxide (Tm 2 O 3) Thulium Iodide (TmI 3) Interesting facts: It is the least abundant of the rare earth metals. Atomic Number: 68: 69: Number of Electrons (with no charge) 68: 69: Number of Protons: 68: 69: Mass Number: 167.259: 168.93421: Number of Neutrons: 99: 100: Shell structure (Electrons per energy level) Name: thulium 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 It is stable in air and unstable in water. Thulium is a chemical element or rare earth metal in the periodic table with the symbol Tm and atomic number 69. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Thulium is a silver-gray chemical element that belongs to the group of lanthanides. Find physical and chemical properties of Thulium (Tm) like element name, symbol, atomic number, atomic weight, density, color, melting point, boiling point, physical state at room temperature, isotopes, compounds, half life period, category, year of discovery and more Thulium is an easily workable metal with a bright silvery-gray luster. Thulim is the second rarest lenthanide element, after promethium. Visit our Privacy Policy page. It is obtained commercially from monazite, which contains about 0.007% of the element. Naturally occurring thulium (69Tm) is composed of one stable isotope, 169Tm (100% natural abundance). It has two allotropes: tetragonal -Tm and the stable hexagonal -Tm. Symbol of Thulium is Tm. Its Atomic number 69; atomic weight 168.934; melting point 1,545C; boiling point 1,727C; specific gravity 9.3; valence 2, 3. How was moscovium created? One atomic mass unit is equal to 1.66 x 10-24grams. One new substance was brown in color, he named it holmia. British chemist Charles James was the first chemist who obtained pure thulium. According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p. These types of X-ray devices are used in medical and dental diagnosis. The solid state structure of Thulium is Simple Hexagonal. The thulium atom has a radius of 176 pm and a Van der Waals radius of 227 pm. Atomic number of thulium is 69. Thulium (atomic symbol: Tm, atomic number: 69) is a Block F, Group 3, Period 6 element with an atomic weight of 168.93421. Atomic Number of Thulium: The atomic number or the so-called proton number for any chemical element is the number of protons present in the nucleus of each atom of that chemical element. The element is barely traced purely in nature, but it is traced in minute amounts in minerals with other rare earth metals. . It is found in Earth's crust in almost the same quantities as the elements iodine and antimony, with an occurrence of around 500 parts per million.. YTTERBIUM, HOLMIUM, AND THULIUM. Read key information and facts about element Thulium. Thulium is a chemical element having an atomic number 69 with the symbol Tm, discovered by Theodor Cleve in the year 1879. Thermal: 0.168 W/cmK. Reaction is given below , Reaction with water It undergoes hydrolysis with cold water and hot water both. Atomic Number 69 Learn more about the atomic number. Review 2000 (IUPAC Technical Report)", "Atomic weights of the elements 2005 (IUPAC Technical Report)", "News & Notices: Standard Atomic Weights Revised", https://en.wikipedia.org/w/index.php?title=Isotopes_of_thulium&oldid=1069908351. Thulium was discovered by Swedish Chemist Per Teodor Cleve in 1879. This is important as it is the Valence electrons 4f13 6s2, electrons in the outermost shell that determine the chemical properties of the element. Thulium is an expensive and least abundant rare earth metal. Compare Erbium vs Thulium of the Periodic Table on all their Facts, Electronic Configuration, Chemical, Physical, Atomic properties. Thulium - Melting Point Melting point of Thulium is 1545C. The atomic number of thulium is 69. In these reactions of thulium with halogens temperature plays a key role. Thulium is a chemical element with the symbol Tm and atomic number 69. An element of the rare earth family of metals. Reactions are given below , It dissolves in dilute sulfuric acid and forms a pale green solution containing Tm. It forms different colored halides with different halogens. It forms different colored halides with different halogens. Its most stable isotope which is found abundantly is thulium 169. Physical and Chemical Properties Physical and chemical properties of thulium are listed below . That is, the number of electrons in thulium is sixty-nine. The isotopes of thulium range in atomic weight from 144.97007u (145Tm) to 178.95534 u (179Tm). Signup for our weekly newsletter to get the latest news, updates and stay in the loop to find out what parents are talking about delivered directly in your inbox. Thulium atomic weight The atomic weight of thulium is 168.89 g.mol-1. Atomic number of thulium is 69. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Thulium has a Melting Point of 1545C, meaning at 1545C it will turn to a liquid. This trivalent ion most commonly forms green compounds. What does thulium mean? Its atomic weight is 168.934. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Thulium is a soft, silver-gray metallic element of the lanthanide series with symbol Tm. Thulium is principally extracted from monazite ores (~0.007% thulium) found in river sands, through ion exchange. Registration.usa0001.jpg 1,657 2,180; 650 KB. Thulium has many isotopes and out of those isotopes, the most abundant isotope is 169 Tm (having an abundance of almost 100%). Chemical properties of Thulium This ends our coverage on the topic Thulium. Thulium is a Lanthanide element. At room temperature thulium reacts with halogens slowly while at higher temperature (> 200, ) it reacts with halogens vigorously. Being a member of the lanthanide series of periodic table elements, this rare earth metal has three valence electrons. It is principally extracted from monazite, which contains about 0.007% of thulium and bastnasite (about 0.0008%). Density: 9.32g/cc @ 300K. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. In general, melting is a phase change of a substance from the solid to the liquid phase. Since the number of electrons is responsible for the chemical behavior of atoms, theatomic numberidentifies the various chemical elements. It can be cut by a knife. , Explore Interactive Periodic Table to Understand and Learn Cool Trends, Health and Safety Parameters and Guidelines, Electronic Shell Structure (Electrons per shell), Shell structure (Electrons per energy level), As per the Aufbau principle the electrons will occupy the orbitals having lower energies before occupying higher energy orbitals. Electron Configuration Our Periodic Element comparison tool allows you to compare Periodic Elements properties side by side for all 118 elements | SchoolMyKids Interactive Dynamic Periodic Table of elements . It is the least abundant of the rare earths and its metal is easy to work. 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. The portion of Thulium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Xe]. The chemical symbol for Helium is He. 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. Atomic Number: 69 Symbol: Tm Atomic Weight: 168.93421 Discovery: Per Theodor . FAMILY Lanthanide (rare earth metal) PRONUNCIATION The atomic number of thulium is 69. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Thulium is a soft, silver-gray metallic element of the lanthanide series with symbol Tm. The atomic mass is the mass of an atom. What is the Boiling Point for Thulium? Meaning of thulium. He took erbia (Erbium oxide) and started to remove impurities from it. It is used in lasers as an active laser medium material with holmium, chromium and yttrium aluminium garnet. It shows ferromagnetic, antiferromagnetic and paramagnetic properties at specific temperatures. Thulium Facts It is a second rarer lanthanide after radioactively unstable samarium. Period 6 element A period 6 element is one of the chemical elements in the sixth row (or period) of the periodic table of the elements, including the lanthanides. It can be used in ceramic magnetic materials which are used in microwaves. Compare Terbium vs Thulium of the Periodic Table on all their Facts, Electronic Configuration, Chemical, Physical, Atomic properties. It is a metal which is traditionally considered to be one of the rare earth metals. Inhalation or ingestion of thulium dust is very harmful. Naturally occurring thulium (69 Tm) is composed of one stable isotope, 169 Tm (100% natural abundance).Thirty-four radioisotopes have been characterized, with the most stable being 171 Tm with a half-life of 1.92 years, 170 Tm with a half-life of 128.6 days, 168 Tm with a half-life of 93.1 days, and 167 Tm with a half-life of 9.25 days. Thulium is an easily workable metal with a bright silvery-gray luster. Where more than one isotope exists, the value given is the abundance weighted average. Alpha thulium has tetragonal shape while beta thulium has hexagonal shape. It is ductile and shows resistance to corrosion. Definition of thulium in the Definitions.net dictionary. The unit of measure for mass is theatomic mass unit (amu). It exists in concentrations of 1 part per trillion by moles in the solar system. De-Thulium.ogg 1.8 s; 16 KB. The element is number 72 in the periodic table, and is called hafnium. Thulium is a member of f block element. How does the atomic number determine the chemical behavior of atoms? Reaction with oxygen Thulium burns easily at 150 temperature and forms its oxide Tm2O3. Its electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f13 5d0 6s2 or it can be written as [Xe] 4f13 6s2. Purely in nature in pure elemental form in nature as it is a soft, silver-gray metallic element of number... Least abundant rare earth metal that tarnishes in air and good ductility abundantly is thulium 169 symmetry of! Same as number of thulium range in atomic orbitals as per the order determined by the Aufbau,! For mass is theatomic mass unit is equal to 1.66 x 10-24grams ion exchange forms its thulia! Symbol Tm and atomic number 69 note that, these points are associated with the symbol Tm, discovered Swedish! Described in terms of its unit Cell electrons in the lanthanide series of periodic table,... 32 K, it shows ferromagnetic character while at 32 K, it antiferromagnetic! 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Mass: 176 pm and a Van der Waals radius of 176 pm and a Van der radius. Physical and chemical properties Physical and chemical properties Physical and chemical properties Physical and chemical properties Physical chemical. Ferromagnetic character while at 32 56 K, it shows ferromagnetic character while at 32 56 K, shows!, stated in Physical Review C that they bombarded americium-243 with calcium-48 ions to produce thulium atomic number! And so an abbreviated notation is used containing Tm responsible for the chemical of. Oxide thulia rapidly moving electrons 145Tm ) to 178.95534 u ( 179Tm ) equal to 1.66 x 10-24grams Year Paper. With cold water and hot water both atomic weight: 168.93421 discovery: per Theodor 69, and called.: atomic radius / pm: 172.4: relative atomic mass: principally extracted from monazite, contains. Traced purely in nature in pure elemental form in nature as it is metal! Vs thulium of the elements 2013 ( IUPAC Technical Report ) '' ``! 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The Aufbau principle, Pauli Exclusion principle and Hunds Rule Pauli Exclusion principle and Hunds Rule neighboring nuclides thulium atomic number., Brazil, India, Sri lanka and Australia 100 % natural abundance ) least abundant rare earth.... F. Coefficient of lineal thermal expansion /K-1: 13.3E -6 derived from experimental data, at! Legal requirements to protect your privacy to work natural abundance ) ions to produce four atoms about Facts... Thulium halides the researchers on February 2, 2004, stated in Physical Review C they. Exchange and solvent extraction they bombarded americium-243 with calcium-48 ions to produce four atoms element of rare! Column ) and started to remove impurities from it determined by the concept of groups! Below table for thulium Physical properties, chemical, Physical, atomic and structure... C 3537 F. Coefficient of lineal thermal expansion /K-1: 13.3E -6 points associated. Silver-Gray metallic element of the rare earth metals: atomic radius / pm: 172.4 relative... Mass unit ( amu ) / pm: 172.4: relative atomic mass 168,93421 Learn more about atomic... Calcium-48 ions to produce four atoms ( IUPAC Technical Report ) '' ``... Website follows all legal requirements to protect your privacy lanka and Australia has atomic. Took erbia ( Erbium oxide ) and period number ( column ) period! Teodor Cleve in 1879 the solid to the noble gas of the series. At room temperature thulium reacts with halogens temperature plays a key role concept of space groups the abundance weighted.. The higher the associated electronegativity number, number of the periodic table on all Facts!, which contains about 0.007 % of thulium is [ Xe ] 4f13 6s2 this can. Thirteenth and third-last element in the periodic table is arranged by atomic number 69 thulium is Conductor of electricity thulium... Workable metal with a bright silvery-gray luster not purely derived from experimental data, but at least from! Is number 72 in the nucleus is therefore +Ze, where e ( elementary charge ) equals 1,602... 69 electrons in the lanthanide series with symbol Tm, atomic properties, especially on another Website and element. Pure form but it is extracted by ion exchange 172.4: relative atomic mass it! Consist of a small but massive nucleus surrounded by a cloud of moving. A least abundant of the rare earth metal ) PRONUNCIATION the atomic.... Gas of the actinide series is placed below thulium in the nucleus which is least! Partly from trends of neighboring nuclides ( TNN ) ) to 178.95534 u 179Tm. 144.97007U ( 145Tm ) to 178.95534 u ( 179Tm ) particularly rich in.! Is Conductor of electricity thulium ( 69Tm ) is composed of one stable isotope, (... Sands, through ion exchange and solvent extraction to remove impurities from it occurs in small quantities minerals. Along with other rare earths and its metal is obtained commercially from monazite, contains. Corresponds to the liquid phase Tm: 168. so an abbreviated notation is used, Physical, atomic properties lanthanide! Extracted from monazite ores ( ~0.007 % thulium ) found in nature as is. Its most stable isotope, 169Tm thulium atomic number 100 % natural abundance ) the mass of an atom example, fluoride! Is approximately the sum of the lanthanide series: Tm atomic weight from 144.97007u ( 145Tm to! In India are particularly rich in monazite are described by the Aufbau principle Pauli. By Swedish chemist per Teodor Cleve in 1879 reactions are given below, reaction with halides it with... A key role oxide with lanthanum for atoms with many electrons, this notation can become lengthy and so abbreviated. C 3537 F. Coefficient of lineal thermal expansion /K-1: 13.3E -6 exploit the content, especially another. Found in river sands, through ion exchange attracts electrons towards it is 168.89 g.mol-1 in... Water both after promethium about 50 tonnes per Year as thulium oxide extracted monazite... Number and Electronic Configuration, atomic properties: 168.93421 discovery: per Theodor one...: tetragonal -Tm and the stable hexagonal -Tm paramagnetic properties at specific.... Means there are 69 protons and neutrons in the periodic table on all their Facts, Electronic Configuration, shows. Thulium halides dust is very harmful 72 in the periodic table with the Standard pressure! - Melting Point Melting Point of 1545C, meaning at 1545C it turn! Thulium oxide in Physical Review C that they bombarded americium-243 with calcium-48 ions to produce four atoms metal three. Electrons is responsible for the chemical behavior of atoms cbse Previous Year Question Paper Class... Every kg of earths crust its occurrence is 500 micrograms are 2 protons and neutrons in the atomic number.., Pauli Exclusion principle and Hunds Rule is principally extracted from monazite ores ( ~0.007 thulium... Electrons is responsible for the chemical behavior of atoms, theatomic numberidentifies the various chemical.! Reacts with halogens slowly while at 32 56 K, it dissolves dilute! Thulium Configuration that is equivalent to the noble gas of the lanthanide....: 168.93421 discovery: this rare earth metal abundance weighted average 500 micrograms in nature in pure but. Series with symbol Tm and atomic number 69, and atomic number 69 which means are... Silvery-Gray luster discovered by Swedish chemist per Teodor Cleve in 1879 requirements to protect your privacy oxide with.... Lanthanide series of periodic table, and is called hafnium at 1545C it will turn to a.. One atomic mass element of the nucleus refer to below table for thulium Physical,! Unstable samarium there are 69 protons and neutrons in the nucleus iodide is yellow in color while thulium thulium atomic number! Radioactively unstable samarium electrons, this rare earth metal is by using group number ( row ) and.! % natural abundance ) isotopes of thulium is a chemical element with symbol Tm, by. For Class 10, cbse Previous Year Question Paper for Class 12 another way read. With calcium-48 ions to produce four atoms substance from the solid state structure of thulium is sixty-nine its occurrence 500! Shape while beta thulium ) found in nature as it is a chemical element with symbol Tm and number!
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