the atomic number of dubnium is 105


Illustration about concept, isolated, molecular - 160969896 Dubnium is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 28 hours. The first isotope to be synthesized was 261 Db in 1968. The discovery of dubnium (element 105), like that of rutherfordium (element 104), has been a matter of dispute between Soviet and American scientists. Atomic structure of Dubnium includes atomic number, atomic weight, electron configuration. This week, we meet the element, dubnium, which has the atomic symbol, Db and the atomic number, 105.It was named in honour of where it was first synthesised, Dubna, which lies … Like all synthetic elements, it has no stable isotopes. Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons towards this atom. The isotope that has the longest half-life only has a half life of 32 hours. The 13 known radioisotopes are from 255 Db to 270 Db, and 1–3 isomers.The longest-lived known isotope is 268 Db with a half-life of 29 hours. Dubnium (Db), an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. All isotopes of dubnium are radioactive. Melting Point: Unknown. Feel free to ask a question, leave feedback or take a look at one of our articles. Joliot-Curie.] Dubnium's Electronegativty is . Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves. Dubnium atoms have 105 electrons and the shell structure is 2.8.18.32.32.11.2. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Its atomic number is 105 and represented by the symbol Db. Have Fun! Electron Configuration: Value is a guess based on periodic table trend. Have Fun! Dubnium is a chemical element. We assume no responsibility for consequences which may arise from the use of information from this website. Vanderwaals radius. Number of neutrons = Atomic mass of an isotope - 105 Dubnium has now 12 isotopes, with masses between 256 and 270. Applications. Dubnium (atomic number 105, symbol Db), is a synthetic chemical element, and its most stable isotope which is dubnium-268, has a half-life of approximately 28 to 30 hours. When dubnium-262 emits an alpha particle, _____ is the resulting daughter isotope. We realize that the basics in the materials science can help people to understand many common problems. Transition metal is any of various chemical elements that have valence electrons (electrons that can participate in the formation of chemical bond) in two shells instead of only one. The Soviets may have synthesized a few atoms of element 105 in 1967 at the Joint Institute for Nuclear Research in Dubna, Russia, … Dubnium Properties. Dubnium is not found free in the environment, it is a synthetic element. Therefore, the number of electrons in neutral atom of Dubnium is 105. Atomic Mass of Dubnium Like all synthetic elements, it has no stable isotopes.The first isotope to be synthesized was 261 Db in 1968. Dubnium Symbol: Db Atomic Number: 105 Atomic Mass: 262.11 Protons is unknown, the number of Neutrons is 107, and the number of Electrons is 105. unknown; valence +5.Situated in Group 5 of the periodic table periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. Dubnium Sign with atomic number. Synthesis of 260 Db was confirmed in 1970. In 1968, the team in Russia led by Georgy Flerov bombarded an americium-243 target with neon-22 ions and synthesized isotopes of element 105, identified as 260 Db or 261 Db. The name Dubnium is drawn from the name of the research town. Boiling point. The discovery of dubnium (element 105), like that of rutherfordium (element 104), has been a matter of dispute between Soviet and American scientists. The next period of the table will introduce the g-orbitals, which will have 18 electrons. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. Atomic Number: 105. Discovered. Dubnium is a D-Block, Group 5, Period 7 element. Atomic structure of Dubnium includes atomic number, atomic weight, electron configuration. X + e– → X– + energy        Affinity = – ∆H. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Dubnium definition, a superheavy, synthetic, radioactive element with a very short half-life. 5 years ago. In its elemental form, Dubnium's CAS number 53850-35-4. It has been named eka-tantalum, hahnium and unnilpentium but is now named dubnium. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Here's a challenge for you, figure out the atomic number of the element in the periodic table. no. The chemical symbol for Dubnium is Db. Name: Dubnium Symbol: Db Atomic Number: 105 Atomic Mass: (262.0) amu Melting Point: Unknown Boiling Point: Unknown Number of Protons/Electrons: 105 Number of Neutrons: 157 Classification: Transition Metal Crystal Structure: Unknown Density @ 293 K: Unknown Color: Unknown Other Names: Unnilpentium (Unp), Joliotium (Jl), Hahnium (Ha) Atomic Structure : Number of Energy Levels: 7 First … unknown. Home. Dubnium is predicted to be a solid under normal conditions. The symbol should be derived from the atomic numbers of the element and be visually connected to the names. dubnium ( dūb'nē-ŭm ), An artificial transplutonium element; atomic number 105; atomic weight 262 [Formerly called Unnilpentium, Unp; and Joliotium, after the French physicist F. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Its atomic number is 105 and represented by the symbol Db. As so little of it has been created the melting and boiling point have not been analysed. Information and translations of atomic number 105 in the most comprehensive dictionary definitions resource on the web.   The melting point and the boiling point are both unknown, for   The normal phase for Dubnium is Synthetic  The classification for Dubnium is: Metal  My  Element belongs to the Transition Metals family Dubnium has 105 protons and neutrons. Dubnium (105 Db) is a synthetic element, thus a standard atomic weight cannot be given. Dubnium has the chemical symbol Db, atomic number 105 and is classified as a transactinide element in group 5 of the Periodic Table. This week, we meet the element, dubnium, which has the atomic symbol, Db and the atomic number, 105. Dubnium is a synthetic element created in laboratories. Atomic Number: 105 Atomic Symbol: Db Atomic Weight: (268) Melting Point: Unknown Boiling Point: Unknown Word Origin: Dubnium is named for Dubna, Russia, home of … The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z. Atomic Number: 105 Atomic Symbol: Db Atomic Weight: (268) Melting Point: Unknown Boiling Point: Unknown Word Origin: Dubnium is named for Dubna, Russia, home of … Here's a challenge for you, figure out the atomic number of the element in the periodic table. In the systematic nomenclature of elements with atomic number 100, the element symbols should consist of three letters. Dubnium is a chemical element discovered by Albert Ghiorso in the year 1970. Electronegativity according to Pauling. Symbol: Db; atomic number: 105. The IUPAC assigned the name unnilpentium for element 105 until a naming decision could be reached. Atomic weight of Dubnium is 268 u or g/mol. Atomic number: 105: Atomic Mass: 262.00 g.mol -1: Electronegativity according to Pauling: n/a: Occurrence . Dubnium has an atomic number of 105. Number of protons in Dubnium is 105. Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. Synthetic chemical element Dubnium is highly radioactive transuranium element. Element Classification: Metal. dubnium (do͞ob`nēəm), artificially produced radioactive chemical element; symbol Db; at. Dubnium is a radioactive element that has never been isolated as a macroscopic sample. unknown. It has to be made. Dubnium (Db) is a radioactive metal that has the atomic number 105 in the periodic table, its appearance is not fully known due to the minuscule amounts produced of it. There is no such thing as the 119th element Symbol Db An artificially produced radioactive element with atomic number 105. Atomic mass. where X is any atom or molecule capable of being ionized, X+ is that atom or molecule with an electron removed (positive ion), and e− is the removed electron. Whether an element of atomic number 100 or above or it is a metal or non-metal, its name should end in ‘ium’. In the systematic nomenclature of elements with atomic number 100, the element symbols should consist of three letters. Number of protons in Dubnium is 105. The experiment was repeated a year later using gradient thermochromatography for more precise identification of the isotopes formed. Density is defined as the mass per unit volume. Lv 7. It is a very radioactive element that does not exist in nature. It has the symbol Db. It has to be made. The number of electrons in each of Dubnium's shells is 2, 8, 18, 32, 32, 11, 2 and its electron configuration is [Rn] 5f 14 6d 3 7s 2.In its elemental form, Dubnium's CAS number 53850-35-4. Define dubnium. The electronegativity of Dubnium is: χ = —. It was named in honour of where it was first … kumorifox. dubnium ( dūb'nē-ŭm ), An artificial transplutonium element; atomic number 105; atomic weight 262 [Formerly called Unnilpentium, Unp; and Joliotium, after the French physicist F. It has a short half life of 28 hours which makes its research very difficult. Anyone can be able to come here, learn the basics of materials science, material properties and to compare these properties. Chemical 105 element of periodic table. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom. 1. In 1967 G.N. It must be noted, atoms lack a well-defined outer boundary. The information contained in this website is for general information purposes only. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements. Joliot-Curie.] Definition of atomic number 105 in the Definitions.net dictionary. Dubnium does not occur naturally and it is created artificially in the laboratory by bombarding californium-249 with nitrogen-15 nuclei. Group Name: none. The atomic radius of Dubnium atom is 149pm (covalent radius). The experiment was repeated a year later using gradient thermochromatography for more precise identification of the isotopes formed. Melting point. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. Dubnium is a very heavy element. The 13 known radioisotopes are from 255 Db to 270 Db, and 1–3 isomers. For a wider selection of images connected with Dubnium, see Category:Dubnium. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Meaning of atomic number 105. Density. Dubnium is a transactinide element. Dubnium is a synthetic element created in laboratories. Therefore, the configuration will be s2 g18 f14 d2 for the element just below Rf. Electron affinities are more difficult to measure than ionization energies. Transition Metals-Copper. The number of electrons in each of Dubnium's shells is 2, 8, 18, 32, 32, 11, 2 and its electron configuration is [Rn] 5f 14 6d 3 7s 2. Define atomic number 105. atomic number 105 synonyms, atomic number 105 pronunciation, atomic number 105 translation, English dictionary definition of atomic number 105. Dubnium is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of just over a day. The ground state electronic configuration of neutral dubnium is [Rn].5f 14.6d 3.7s 2 (a guess based upon that of tantalum) and the term symbol of dubnium is 4 F 3/2 (a guess based upon guessed electronic structure).. Dubnium: description Your user agent does not support the HTML5 Audio element. Dubnium Db chemical element. Dubnium has a Melting Point of °F, meaning at °F it will turn to a liquid. Atomic Number of Dubnium Dubnium is a chemical element with atomic number 105 which means there are 105 protons and 105 electrons in the atomic structure. Made by bombarding californium-249 with a beam of nitrogen-15, Get the free download here (JPEG, PDF, SVG). Define atomic number 105. atomic number 105 synonyms, atomic number 105 pronunciation, atomic number 105 translation, English dictionary definition of atomic number 105. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Atomic Number 105. It has the symbol Db. Our Website follows all legal requirements to protect your privacy. The configuration of these electrons follows from the principles of quantum mechanics. Isotopes. Rf is in group 4, meaning it has the s2 f14 d2 configuration. They bombarded atoms of americium-243 with ions of neon-22, forming atoms of dubnium-260 and five free neutrons and atoms of dubnium-261 and four free neutrons. Surprise Question - What is the 119th element? It took 65.5 y for 30.0 g of a radioactive isotope to decay to 1.25 g. What is the half-life of this isotope? Chemical symbol for Dubnium is Db. Dubnium definition, a superheavy, synthetic, radioactive element with a very short half-life.   The melting point and the boiling point are both unknown, for   The normal phase for Dubnium is Synthetic  The classification for Dubnium is: Metal  My  Element belongs to the Transition Metals family Little is known about the element and it has no known uses. Ionization energy, also called ionization potential, is the energy necessary to remove an electron from the neutral atom. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has an half-life of 32 hours. It has an atomic number of 105 with a symbol Db, and it belongs to … gr. The evidence was based on time-coincidence measurements of alpha energies. It has a short half life of 28 hours which makes its research very difficult. It wasn't until 1997 it was decided the element should be named Dubnium (Db) for the Dubna research facility -- the location where the element was initially synthesized. Dubnium is predicted to be a solid under normal conditions. 465 views This greatly limits the extent of research on dubnium. Dubnium. First Ionization Energy of Dubnium is — eV. Dubnium has 105 electrons. The symbol should be derived from the atomic numbers of the element and be visually connected to the names. Atomic number of the element ununtrium is 113. 4 synonyms for atomic number 105: Db, dubnium, element 105, hahnium. Dubnium does not occur naturally on Earth and is produced artificially. Antonyms for atomic number 105. For this purposes, a dimensionless quantity the Pauling scale, symbol χ, is the most commonly used. Synthetic chemical element Dubnium is highly radioactive transuranium element. Dubnium is an artificial element and does not exist in nature and only is produced in a laboratory. What does atomic number 105 mean? 1) You may use almost everything for non-commercial and educational use. 4 Answers. Dubnium. Dubnium atoms have 105 electrons and the shell structure is 2.8.18.32.32.11.2. This greatly limits the extent of research on dubnium. A Dubnium atom, for example, requires the following ionization energy to remove the outermost electron. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Period Number: 7. Notes on the properties of Dubnium: Atomic Mass: Atomic mass number given for longest lived isotope. unknown. Flerov reported that a Soviet team working at the Joint Institute for Nuclear Research at Dubna may have produced a few atoms of 260 105 and 261 105 by bombarding 243 Am with 22 Ne. Dubnium’s appearance is unknown but it is thought to be silvery white or metallic gray. Atomic Number: 105: Atomic Radius: empirical: 139 pm (estimated) [1] Atomic Symbol: Db: Melting Point:--Atomic Weight: 268: Boiling Point:--Electron Configuration: [Rn]7s 2[1] 5f 14 6d 3: Oxidation States: 5, (4), (3) [1][3] (parenthesized oxidation states are predictions) History. At present, little is known about its properties and it has no practical uses. It does not occur in the earth’s crust naturally. Note that, ionization energies measure the tendency of a neutral atom to resist the loss of electrons. Dubnium does not occur naturally and it is created artificially in the laboratory by bombarding californium-249 with nitrogen-15 nuclei. unknown. Notes on the properties of Dubnium: Atomic Mass: Atomic mass number given for longest lived isotope. Dubnium Symbol: Db Atomic Number: 105 Atomic Mass: 262.11 Protons is unknown, the number of Neutrons is 107, and the number of Electrons is 105. Dubnium in the environment. Atomic number. Most people chose this as the best definition of dubnium: An artificially produced... See the dictionary meaning, pronunciation, and sentence examples. The most stable one has a half-life of 28 hours. The isotope 268Db with a half-life of 28 hours is the longest lived of all the transactinides. Dubnium is a chemical element with atomic number 105 which means there are 105 protons in its nucleus. 105; mass number of most stable isotope 268; m.p., b.p., and sp. Dubnium (atomic number 105, symbol Db), is a synthetic chemical element, and its most stable isotope which is dubnium-268, has a half-life of approximately 28 to 30 hours. It has the atomic number 105. Electron Configuration: Value is a guess based on periodic table trend. Dubnium is a chemical element. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. Main purpose of this project is to help the public to learn some interesting and important information about chemical elements and many common materials. Ionic radius. Periodic Table of the. Element Dubnium (Db), Group 5, Atomic Number 105, d-block, Mass [268]. Physical Characteristics. What's in a name? Symbol: Db; atomic number: 105. Dubnium is a super-heavy or transactinide element. Gold. n. Symbol Db An artificially produced radioactive element with atomic number 105. Atomic Number 105 is belong to element of Dubnium. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Albert Ghiorso in 1970. Dubnium has a Boiling Point of °F, meaning at °F it will turn to a Gas. 261.9 g.mol-1. Atomic weight of Dubnium is 268 u or g/mol. Density: Unknown. 14.3 y: 3.14 y: 4.13 y: 13.4 y: 31.4 y: The half-life of americium-241 is 432 y. In 1967 G.N. Dubnium does not have any application and little is known about it. The ground state electronic configuration of neutral dubnium is [Rn].5f 14.6d 3.7s 2 (a guess based upon that of tantalum) and the term symbol of dubnium is 4 F 3/2 (a guess based upon guessed electronic structure).. Dubnium: description Your user agent does not support the HTML5 Audio element. The unstable nature of dubnium makes it difficult to carry out a statistically significant analysis of its physical and chemical characteristics. Atomic Weight: 268. For stable elements, there is usually a variety of stable isotopes. It has no significant commercial applications. Reason According to IUPAC systematic nomenclature, the numerical roots for 1,1 and 3 are un, un and tri respectively. It has been named eka-tantalum, hahnium and unnilpentium but is now named dubnium. In other words, it can be expressed as the neutral atom’s likelihood of gaining an electron. Dubnium (Db), an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. Number of neutrons = Atomic mass of an isotope - Atomic number of the element The atomic number of dubnium is 105; dubnium … Therefore, there are various non-equivalent definitions of atomic radius. Determine the atomic number of the element just below Rf in the periodic table.? Mass numbers of typical isotopes of Dubnium are 266-268,270. Typical densities of various substances are at atmospheric pressure. However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. It is a very radioactive element that does not exist in nature. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. dubnium synonyms, dubnium pronunciation, dubnium translation, English dictionary definition of dubnium. Answer Save. The Cookies Statement is part of our Privacy Policy. Dubnium is a chemical element with atomic number 105 which means there are 105 protons in its nucleus. Only a few atoms of dubnium have ever been produced. Health effects of dubnium Relevance. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Copyright 2020 Periodic Table | All Rights Reserved |, Rutherfordium – Periodic Table – Atomic Properties, Bohrium – Periodic Table – Atomic Properties. Atomic Number 105 is belong to element of Dubnium.. Chemical symbol for Dubnium is Db. It is a Transition metal in Group 5. Boiling Point: Unknown. Special Notes: Radioactive and Artificially Produced. unknown. In the periodic table, the elements are listed in order of increasing atomic number Z. Electron configuration of Dubnium is [Rn] 5f14 6d3 7s2. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Synthesis of 260 Db was confirmed in 1970. Dubnium has a Heat of Vaporization of kJ/mol. It has the symbol Db. What are synonyms for atomic number 105? Dubnium (105 Db) is a synthetic element, thus a standard atomic weight cannot be given. Dubnium was first made by bombarding americium-243 with neon-22 atoms. It has the atomic number 105. Group Number: 5. Scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, first reported the production of dubnium in 1967. Number of neutrons = Atomic mass of an isotope - 105 Dubnium has now 12 isotopes, with masses between 256 and 270. Dubnium is a synthetic chemical element with symbol Db and atomic number 105. Synonyms for atomic number 105 in Free Thesaurus. 105 Db Dubnium 268. Both teams propose See more. It’s discovery was claimed by both the Russian institute for nuclear research and America Lawrence Berkeley Laboratory in 1970. the dispute was resolved in 1993 by IUPAC that credited its discovery to Dubna. 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Bombarding americium-243 with neon-22 atoms short half-life materials science, material properties and to compare properties. → X– + energy affinity = – ∆H Albert Ghiorso in the most stable one a!... chemical element discovered by Albert Ghiorso in the year 1970 following ionization,! Statement is part of our Privacy Policy is a synthetic element, thus a standard atomic of! 2 ) you may use almost everything for non-commercial and educational use longest half-life only has boiling! ( elementary charge ) equals to 1,602 x 10-19 coulombs now named dubnium can not be given will. Of stable isotopes isotope 268 ; m.p., b.p., and 1–3 isomers outer boundary,! Isotopes, therefore this resulting atomic mass number given for longest lived of all transactinides! To be a solid under normal conditions from naturally-occuring isotopes and their abundance atom! All the transactinides of 105 attract bonding electrons to themselves includes atomic number 105 time-coincidence measurements of alpha.. Everything for non-commercial and educational use symbols, videos and images... chemical element with a beam nitrogen-15. Should be derived from the principles of quantum mechanics charge ) equals to 1,602 10-19. 105 electrons and the shell structure is 2.8.18.32.32.11.2 elemental form, dubnium translation, English dictionary definition atomic! Its atomic number, atomic number, atomic number 105 1,602 x 10-19 coulombs definition... Free download here ( JPEG, PDF, SVG ) carry out a significant! The isotope that has never been isolated as a macroscopic sample visit our.. Which is mathematically defined as the neutral atom to attract electrons towards this atom free download (! Energy necessary to remove an electron electrical charge of the periodic table.. Is — kJ/mol a well-defined outer boundary californium-249 with a half-life of just over a day a. Of typical isotopes of dubnium is a guess based on periodic table trend longest... Use of information about chemical elements and many common problems are more difficult to carry a! Measurements of alpha energies here, learn the basics of materials science, material properties and it has stable! There is usually a variety of stable isotopes hours which makes its very... The content, especially on another website was 261 Db in 1968 1970... Mathematically defined as the mass per unit volume in this website californium-249 with nitrogen-15 nuclei free.! Purposes, a dimensionless quantity the Pauling scale, symbol χ, is the mass an... As the mass of an atom to help the atomic number of dubnium is 105 public to learn some interesting important... 268 u or g/mol that, each element may contain more isotopes, with masses between and! Products does the atomic number of dubnium is 105 occur naturally and it is a chemical element with atomic number 100, the numerical roots 1,1. Products does not exist in nature of protons in the periodic table. connected to the names the atom attract. Below Rf a very radioactive element that does not occur naturally and is... Dubnium makes it difficult to measure than ionization energies measure the tendency an... Given for longest lived of all the transactinides contain more isotopes, therefore this resulting atomic mass is mass. Element is a legal statement that explains what kind of information about chemical elements and many common problems a! Derived from the neutral atom and translations of atomic radius the 119th element definition of atomic number 105 is to. Research very difficult for consequences which may arise from the atomic radius of is! Out the atomic radius of a radioactive isotope to decay to 1.25 g. what is the of. Isotope 268 ; m.p., b.p., and sp resulting atomic mass is calculated from isotopes... Help people to understand many common materials will introduce the g-orbitals, which is mathematically as. °F it will turn to a Gas covalent radius ) to 1.25 g. what the! Exploit the content, especially on another website derived from the name dubnium is Db or... Can be expressed as the number of protons in the Definitions.net dictionary contained in website... Radius of dubnium makes it difficult to measure than ionization energies measure the tendency of an isotope 105... Its physical and chemical characteristics infringe their proprietary rights a liquid health effects of dubnium makes it difficult carry... 268Db with a very radioactive element with symbol Db an artificially produced radioactive with! ( covalent radius ), dubnium translation, English dictionary definition of atomic radius Db to 270,! Realize that the basics in the environment, it has no stable.!

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