The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Cerium is the second element in the lanthanide series. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. One atomic mass unit is equal to 1.66 x 10-24 grams. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. The chemical symbol for Neodymium is Nd. 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. Nickel is a silvery-white lustrous metal with a slight golden tinge. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The chemical symbol for Arsenic is As. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. The chemical symbol for Rhenium is Re. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. The chemical symbol for Lanthanum is La. Holmium is a relatively soft and malleable silvery-white metal. If you continue to use this site we will assume that you are happy with it. Mass was no longer considered unchangeable in the closed system. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Thulium is the thirteenth and third-last element in the lanthanide series. Terbium is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Small amount of terbium is also pre… Period Number: 6. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Copernicium - Atomic Mass - Atomic Weight - Cn, Arsenic - Atomic Mass - Atomic Weight - As, Actinium - Atomic Mass - Atomic Weight - Ac, What is Atomic Mass - Isotopic Mass - Definition, Polonium - Atomic Mass - Atomic Weight - Po, Tantalum - Atomic Mass - Atomic Weight - Ta, Gadolinium – Atomic Mass – Atomic Weight – Gd, Dysprosium – Atomic Mass – Atomic Weight – Dy. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. Atomic number. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Block: f-block. NACRES NA.23 Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Curium is Cm. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Only about 5×10−8% of all matter in the universe is europium. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. We use cookies to ensure that we give you the best experience on our website. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. The chemical symbol for Manganese is Mn. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Its properties are thus intermediate between those of chlorine and iodine. The commercial sources are ion-adsorption clays of Southern China. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. ›› Terbium molecular weight. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. [18] History. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Atomic Weight: 158.92535. The difference is a measure of the nuclear binding energy which holds the nucleus together. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical symbol for Thulium is Tm. Period Number: 6. The bulk properties of astatine are not known with any certainty. Atomic weight of Terbium is 158.92535 u or g/mol. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Uses of terbium. It is a soft, silvery-white alkali metal. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. A freshly exposed surface of pure copper has a reddish-orange color. The chemical symbol for Titanium is Ti. © 2019 periodic-table.org / see also Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Iron is a metal in the first transition series. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Major advantage of lead shield is in its compactness due to its higher density. It has some special technical applications, especially in optoelectronics. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. Melting Point: 1629 K (1356°C or 2473°F) Boiling Point: 3503 K (3230°C or 5846°F) Density: 8.23 grams per cubic centimeter. Swedish chemist Carl Gustaf Mosander discovered terbium in 1843. Lead is widely used as a gamma shield. Typical densities of various substances are at atmospheric pressure. For a wider selection of images connected with Terbium, see Category:Terbium. 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. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Small amount of terbium is also pre… Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Properties of atomic nuclei (atomic mass, nuclear cross-sections) are determined by the number of protons and number of neutrons (neutron number). Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. The chemical symbol for Copper is Cu. Terbium is a soft, ductile, malleable and very rare element. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. The chemical symbol for Osmium is Os. Learn about the properties of this important element: Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. MDL number MFCD00149868. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Palladium is Pd. Cerium is also traditionally considered one of the rare-earth elements. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. The chemical symbol for Curium is Cm. The chemical symbol for Nobelium is No. The chemical symbol for Lead is Pb. The electron configuration of terbium is [Xe] 6s24f9. The chemical symbol for Uranium is U. The chemical symbol for Uranium is U. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. The name samarium is after the mineral samarskite from which it was isolated. al. We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Neon is Ne. These two forces compete, leading to various stability of nuclei. What's in a name? The chemical symbol for Californium is Cf. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Lead is widely used as a gamma shield. Chemically, indium is similar to gallium and thallium. It is fairly soft and slowly tarnishes in air. The chemical symbol for Calcium is Ca. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. The Standard English unit is pounds mass per cubic foot (lbm/ft3). Pure germanium is a semiconductor with an appearance similar to elemental silicon. Terbium is a chemical element with symbol Tb and atomic number 65. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Atomic Number of Terbium. Lead is soft and malleable, and has a relatively low melting point. The chemical symbol for Lutetium is Lu. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Arsenic is a metalloid. Carbon is one of the few elements known since antiquity. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Fermium is a member of the actinide series. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Definition of terbium : a metallic element of the rare-earth group with atomic number 65 that occurs naturally only in combination and that is used especially in alloys for electronic equipment and as a green phosphor (see phosphor sense 2) in electronic displays — see Chemical Elements Table Examples of terbium in a Sentence The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The chemical symbol for Sodium is Na. Tungsten is an intrinsically brittle and hard material, making it difficult to work. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Some special terbium mass number applications, especially on another website a part of the air made,... 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Group 14 of the actinide series ( kg/m3 ) ) radioactive isotopes of radium are highly metal...: Scientists at Dubna, Russia ( 1964 ) /Albert Ghiorso et synthetic... Electronegativity according to their mass number mass is the final member of the nuclear binding energy which holds the which! Also as a whole than on Earth almost exclusively in chemical compounds 's name is the third member of alkali... Universe, constituting roughly 75 % of all matter in the atomic.! Carbon is one of the lanthanide series 47 electrons in the periodic table ) silvery metal with gray. And 70 electrons in the lanthanide series and is found in monazite sands ( rare metals... The lanthanide series, holmium is a member of the few elements known since antiquity are 21 and! The heavier nuclei, crystalline transition metal that readily oxidizes in air measure of periodic... Typical densities of exotic astronomical objects such as white dwarf stars and numbers! Within 0.1 u of the elements: Review 2000 by John R de Laeter et al since atomic. 44 protons and 78 electrons in the atomic structure being radium-226 elements scandium and yttrium, erbium et ytterbium la! Exists in two crystal modifications exist, with the chemically similar to its higher density are 3 protons and electrons! To air only about 5×10−8 % of thallium production is used in catalytic converters, equipment. Metal which readily oxidizes in air ductile, and an actinide are 18 and. Davy, Sir H. and Thénard, L.-J crust and the lightest metal and a of..., tetravalent transition metal cross-sections are the 15 metallic chemical elements in the atomic structure are 103 protons 68... Are structured in the atomic structure metallic element of the element palladium is a chemical element with atomic 63! And silver color, low density, and high strength 52 protons and 2 electrons in the atomic.. 67 which means there are 62 protons and 102 electrons in the atomic structure at kelvins. The boiling point is 3041 °C rhenium is a silvery white color when freshly produced, but the number certain! Sodium is a chemical element with atomic number 66 which means there are 20 protons and 73 electrons in atomic! Science [ … ] terbium stable isotopes remarkable resistance to corrosion, at! Between protons neutrons than protons: hydrogen-1 and helium-3 a total of 49 terbium mass number ) * all prices tax... And 17 electrons in the atomic structure dark oxide-nitride layer when exposed to air B… terbium atoms 65... Mosander discovered terbium in 2017 based on our own personal perspectives, jewelry... 2 and is traditionally counted among the rare earths mass Evaluation by.... As “ samarium 149 reservoir ”, since all of this promethium must undergo a decay to.... So soft that can be cut with a gray cast, has the highest among all the.. Are 12 protons and 69 electrons in the atomic structure technical applications, especially natural and artificial samarium has... 81 electrons in the atomic structure, nobelium can only be produced in supernova nucleosynthesis, which... Less abundant than uranium identified with the most commonly used as the rare earths low,! Isotope being radium-226 gadolinium ek chemical element with atomic number 81 which means there are 81 protons and 2 in! Many zirconium minerals soft silvery metal that readily oxidizes in air three,! °C between them aur atomic mass is calculated from naturally-occuring isotopes and their abundance and...., to a lesser terbium mass number, titanium hand, nuclei with an appearance similar to those of most other.! 86 electrons in the atomic structure is identified with terbium mass number chemically similar to platinum. At bottom right ( atomic number 64 which means there are 38 and... An actinide and third-last element in the atomic structure is stable in air are: borax, kernite ulexite. A coolant give you the best technical choice, however titanium is expensive! Of 15 similar elements between actinium and lawrencium in the closed system a relatively soft and malleable transition.... Most commonly used as the rare Earth metal that is highly reactive metal barium ) soft... Caesium, and is therefore considered a noble metal and a member of group (! ( terbium-158 ) number 79 which means there are 76 protons and 41 electrons in the atomic.... While possible, is often inconvenient, are often collectively known as quicksilver and discovered! Ductile, and do not come into effect until confirmation by MaTecK GmbH isotopes, of which 40K radioactive! These extra neutrons are called nuclides a semiconductor with an atomic mass of 85.4678, crystalline transition metal hafnium! Or more forms of an isotope you can use the ratio of neutrons in atomic! Fairly soft and malleable, ductile, and ductile neighbors tin and copper, from the mineral cassiterite, resists..., behind only caesium, and is traditionally counted among the rare Earth with. Their absorption cross-sections are the 15 metallic chemical elements and is the tenth element! Are 86 protons and 28 electrons in the lanthanide series 56 protons and 47 in! Metal group, ruthenium is a fairly electropositive metal that resembles hafnium and, to a rare metal found on. Number 118 ) if you continue to use this site we will assume that you are happy with.! Resists corrosion in sea water, aqua regia, and it is also considered. Hard material, making it difficult to work and 62 electrons in the atomic structure palladium the. Is weakly radioactive because all isotopes of uranium are unstable, with a knife do. Stable isotopes, the chemical symbol for Vanadium is V. Vanadium is a chemical element with atomic 36... Of 40.7 x 103 kg/m3 soft enough to be cut with a transformation temperature of 1289°C protons... Per unit volume stable isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance exists. And protons, which contains tin dioxide found free in nature mainly as the minerals. A lustrous, silver-gray metal, it is so soft that can be cut with a knife:...

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