Oct 5, 2014 · This table is a list of the elements in English and Spanish arranged by atomic number. For instance, the symbol ‘H’ denotes Hydrogen, while ‘Au’ represents Gold, deriving from its Latin name ‘Aurum’. 57 La Lanthanum 58 Ce Caesium is a soft, gold-coloured metal that is quickly attacked by air and reacts explosively in water. Used in some rare-earth alloys. Cerium is one of the least expensive rare earths and is the major component of "mischmetal", used in lighter flints because it catches fire easily when struck. They are also used to make special optical glass, as a catalyst promoter, in vacuum tubes and in radiation monitoring equipment. Lanthanides: Properties and Reactions is shared under a CC BY-NC-SA 4. The most common use for caesium compounds is as a drilling fluid. The difference between the neutron number and the atomic number is known as the neutron excess: D Nov 21, 2020 · Atomic Number of Polonium. 6s2 and the term symbol of cerium is 1G4. Moscovium (symbol Mc), for element 115. Klaproth Feb 7, 2019 · The periodic table of elements is widely used in the field of Chemistry to look up chemical elements as they are arranged in a manner that displays periodic trends in the chemical properties of the elements. The Lanthanides consist of the elements in the f-block of period six in the periodic table. Nov 21, 2020 · Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. 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. 12 u: Protons, Neutrons & Electrons in cerium: Protons: 58, Neutrons: 82, Electrons: 58: State of cerium (at STP) Solid: Period number of cerium in periodic table: 6: Block of cerium in periodic table: f-block: Category of cerium: Inner transition metals: Bohr model or Electrons per shell or Group name: Lanthanoid. Beryllium is solid at room temperature. A vertical column in the periodic table. Cerium (Ce) From Named after the asteroid, Ceres, discovered two years before the element. Tennessine (symbol Ts), for element 117. 798 °C. Iron (Fe) Iron is the 26th element in the periodic table and has a symbol of Fe and atomic number of 26. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Number of neutrons. It is also used as a feedstock for the chemical industry. The easiest way to make a virtual periodic table is to start with a template from FigJam. It is used as a water softener. Its naturally-occurring isotopes include Cerium-136, Cerium-138, Cerium-140, and Cerium-142, out of which Cerium-140 is the most abundant (with 88. It has 58 protons in its nucleus, meaning it is the 58th element on Cerium oxide (Ce 2 O 3 and CeO 2) is a component of the walls of self cleaning ovens and of incandescent lantern mantles. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Jun 17, 2023 · Symbol of cerium: Ce: Atomic mass of cerium: 140. 90545 and a mass number of 133. 9. Dec 30, 2019 · Cerium (Ce) is a iron-gray coloured metal that has the atomic number 58 in the periodic table. { a1 , a2 , a3 , a4 , a5 , a6 , a7 , … } = { 2, 8, 8, 18, 18, 32, 32, …. The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. . Four natural isotopes exist, and fifteen radioactive isotopes have been identified. It is a Lanthanide metal. Used in high-intensity carbon lamps and as alloying agents in special metals. Sodium is an alkali metal, being in group 1 of the periodic table. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Jun 28, 2024 · Atomic Radius: The atomic radius of Cerium is about 182. Element 58 of Periodic table is Cerium with atomic number 58, atomic weight 140. Cerium is a chemical element or rare earth metal in the periodic table with the symbol Ce and atomic number 58. 气奧. Aug 2, 2018 · List all Ce properties Cerium atoms have 58 electrons and the shell structure is 2. 6. Iron has twenty-six protons and thirty neutrons in its nucleus, and twenty-six electrons in four shells. sodium (Na), chemical element of the alkali metal group (Group 1 [Ia]) of the periodic table. 5 °C and its boiling point is 671 °C. I have previously written about iron and copper. 1. The table is divided into metals, nonmetals, and metalloids, each with distinct properties. 294. A group is a vertical column down the periodic table, while a period is a horizontal row across the table. The chemical symbol for Carbon is C. Transcript. Found in many minerals like monazite [Ce (PO 4 )]. 845 and a mass number of 56. 93032 Ce or Atomic Number 58. δ- cerium exist above 726 o C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. 92 p +. Today, the names for new elements are proposed by their discoverers but must be approved by the International Union of Pure and Applied Chemistry, an international organization that makes recommendations concerning all kinds of chemical terminology. Sodium is the most common alkali metal and the sixth most abundant element on Earth, comprising 2. Sodium carbonate (washing soda) is also a useful sodium salt. Apr 7, 2022 · Periodic Table Symbols. Because an atom does not have a discrete boundary, there are various non-equivalent definitions of atomic radius, such as Van der Cerium. Oganesson. Number of protons. Lithium Periodic table Boron. Sets found in the same folder. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! Silver is a relatively soft, shiny metal. Uses. 91 u and its density is 1. The free metal does not occur in nature and must be prepared from compounds. You need to understand that the electron configuration of Cerium is basically the representation of May 28, 2024 · Each of the elements found in this column, which are boxed in lavender in Figure 2. Use this visual tool for calculating molar mass for any chemical formula. Relative atomic mass is also known as atomic weight (symbol: A r ). It is a soft, ductile, and silvery-white metal that lies with f-block elements or lanthanides. Jun 2, 2024 · sodium-24. Atomic Radius in the Periodic Table of Elements. The value is just behind that of copper (68 ppm). The last column illustrates how to pronounce these elements. Uses of Cerium: Used in alloys to make them heat-resistant. 01218 u and is classed as alkaline earth metal and is part of group 2 (alkaline earth metal). Its 47 electrons are arranged in the configuration [Kr]4d 10 5s 1 , similarly to copper ([Ar]3d 10 4s 1 ) and gold ([Xe]4f 14 5d 10 6s 1 ); group 11 is one of the few groups in the d-block which has a Nov 6, 2023 · Longest Answer: Planets of the Solar System. The 3rd thing you need to know: Dog Breeds. It tarnishes slowly in air as sulfur compounds react with the surface forming black silver sulfide. You can buy this periodic table poster and more at the Mar 23, 2023 · Electron configuration of Cerium (Ce) [Xe] 4f 1 5d 1 6s 2: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 4f 1 5d 1 6s 2: 2, 8, 18, 19, 9, 2: 59 Melting Point. Sodium is a very soft silvery-white metal. Nov 21, 2023 · The chemical symbol for cerium is Ce. 1 2. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying Apr 9, 2020 · Cerium is a ductile and malleable metal, soft enough to be cut by a sharp object. Its salts are used in the photography and textile industry. The lanthanide ( / ˈlænθənaɪd /) or lanthanoid ( / ˈlænθənɔɪd /) series of chemical elements [a] comprises at least the 14 metallic chemical elements with atomic numbers 57–70, from lanthanum through ytterbium. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Both groups and periods reflect the organization of electrons in atoms. Mendeleev's predicted properties for Eka-aluminum and gallium. The chemical symbol for Mercury is Hg. Cerium (pronunciation: SER-ee-em) is a soft, grayish metal that belongs to the group of lanthanides and is represented by the chemical symbol Ce [1, 2]. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. It is soft and silvery-white in appearance and classified as rare earth metal and belongs to the f-block of the lanthanide group of the periodic table. cerium (Ce), chemical element, the most abundant of the rare-earth metals. 114%. It oxidizes in air at room temperature to form CeO 2. In the periodic table, the vertical columns are called groups and the horizontal rows are called periods. Rubidium is a chemical element with atomic number 37 which means there are 37 protons in its nucleus. Its oxides are used in the optics and glass-making industries. Total number of protons in the nucleus PubChem Periodic Table of Elements is an interactive tool that lets you explore the properties and trends of chemical elements. 88 g/cm 3. From there, you can customize it as you like. Discovered by Martin . If you’d like to see a periodic table in Spanish, check out this Periodic Table, or Tabla Periódica de los Elementos in Spanish. Similar to the majority of other rare earth elements, the customary Nov 21, 2020 · Mass numbers of typical isotopes of Cerium are 140, 142. 11. Also used in glass, flints and ceramics. The oxidized form is used in the glass industry. Solution; The commonly used long form of the periodic table is designed to emphasize electron configurations. How many of their symbols can you name? The full names of the elements are not acceptable answers. Cesium is the 55th element in the periodic table and has a symbol of Cs and atomic number of 55. The chemical symbol for Polonium is Po. Similarly, the p block are the right-most six columns of the periodic table, the d block is the middle 10 columns of the periodic table, while the f block is the 14-column section that is normally depicted as detached from the main body of the periodic table. [2] [3] [4] Lutetium (element 71) is also sometimes considered Cerium (Ce, atomic number 58) is a soft, silvery metal, which was named after the dwarf planet Ceres. m: Silver is similar in its physical and chemical properties to its two vertical neighbours in group 11 of the periodic table: copper, and gold. All two-letter symbols in the periodic table for The Password Game Rule 12 There are plenty Jan 15, 2024 · Elemental Names and Symbols. It is a metalloid (more rarely considered a metal) in the carbon group that is chemically similar to its group neighbors silicon and tin. Cerium is the most abundant lanthanide that makes up 66 ppm of the Earth’s crust. e. Cesium has fifty-five protons and seventy-eight neutrons in its nucleus, and fifty-five electrons in six shells. 1 1. mol -1, and electron configuration [Xe] 4f15d16s2. Groups and periods organize elements on the periodic table of the elements. Silvery metallic element, belongs to the lanthanoids. Quiz by crazyyella. Its only stable isotope is 23 Na. 68amu 68 amu. Nov 21, 2020 · Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. It has high density about 8. Dec 19, 2019 · There are 118 elements in the Periodic Table. Shítián. H. Cerium atomic weight is 140. Cerium atoms have 58 electrons and the shell structure is 2. 6s 2 and the term symbol is 1 G 4 . Sep 20, 2022 · Listed in the table below are other properties that Mendeleev predicted for the first of these two missing elements, which he called "eka-aluminum", compared with the element gallium. Square Numbers Scrambled (1-50) 7. Know everything about Cerium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Mar 9, 2017 · Get periodic table facts on the chemical and physical properties of holmium, element atomic number 67. Cerium reaches its boiling point at 3443°C, 6229°F, 3716 K, while the melting point is achieved at 799°C, 1470°F, 1072 K. Cerium oxide is also used to polish glass surfaces. This element has Periodic Table of the Elements. It occurs abundantly in nature in compounds, especially common salt Germanium is a chemical element; it has symbol Ge and atomic number 32. Cerium, symbol Ce, has a Simple Hexagonal structure and Silver color. It The most common compound of sodium is sodium chloride (common salt). Found in many minerals like monazite sand [Ce (PO 4 )]. 92 e -. It has an atomic weight of 132. Commercial-grade cerium is iron-gray in colour, silvery when in a pure form, and about as soft and ductile as tin. 3360 °C. States of Matter. The atomic mass of cesium is 132. 5. t. Cerium comprises around 0. Oganesson (symbol Og), for element 118. It is part of group null (). Each element has a name. 4f 1 . Periodic Table of Elements - The periodic table is the tabular arrangement of all the chemical elements on the basis of their respective atomic numbers. 5d 1 . Nov 21, 2020 · Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Eka-Aluminum (Ea) ( Ea) Gallium (Ga) ( Ga) Atomic Mass. 12 State: solid Group, period, block: n/a, 6, f Color: silvery white Classification: lanthanide Electron configuration: 4f1 5d1 6s2. 48% natural abundance) [3]. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group 142 Ce. It is more common than lead in the earth's crust. Iron is an enigma – it rusts easily, yet it is the most important of all metals. 8 percent of Earth’s crust. The atomic number of each element increases by one, reading from left to right. CAS Registry: 7440-45-1. Most is used to manufacture steel, used in civil engineering (reinforced concrete, girders etc) and in manufacturing. Cerium is the 58th element in the periodic table and its symbol is ‘Ce’. Use the buttons above to change your view of the periodic table and view Murray Robertson’s stunning Visual Elements artwork. 116 g. 9 amu. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core. Boiling Point. It resembles iron in color and luster, but it is soft, malleable, and ductile. Full technical data. Qì ào. It is malleable, and oxidizes very readily at room temperature, especially in moist air. Below you can find a list of the most important chemical elements and their correct pronunciation. World production is around 24,000 tons per year. Number of electrons. In the periodic table, they fill the 4f orbitals. " v. Main mining areas are in USA, Brazil, India, Sri Lanka, Australia, China. This table is a list of the elements in Chinese and English arranged by atomic number. Cesium is a ductile metal which can be drawn into thin wires. It is a soft, silvery-white, highly reactive metal. Uranium is a silvery-white metal in the actinide series of the periodic table. Multiplication table 1-10. Therefore, a cerium atom has fifty-eight protons and fifty-eight electrons. Cerium. Nov 21, 2020 · Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The Chemistry Division's Periodic Table describes the history, properties, resources, uses, isotopes, forms, costs, and other information for each element. Ceric ammonium nitrate [(NH 4) 2 Ce(NO 3) 6] Cerium chloride (CeCl 3) Cerium hexaboride (CeB 6) Cerium oxide (CeO 2) Cerium sulfate [Ce(SO 4) 2] Interesting facts: Even though it belongs to the rare earth metals group, it isn't rare at all. The chemical symbol for Uranium is U. The periodic table is one of the cornerstones of chemistry because it organizes all the known elements on the basis of their chemical properties. There are 118 named elements in the Periodic Table. It is located in group one, period six and block s of the periodic table. 146 n 0. Cerium is an inner transition metal (or lanthanide) that lies in period six of the periodic table, between lanthanum and praseodymium. A shiny, greyish metal that rusts in damp air. Each element has a symbol, which is a one- or two-letter abbreviation of its name. We get this abbreviated form of the electron configuration after applying the standard formula for the same. The periodic table is a masterpiece of organised chemical information and the evolution of chemistry's periodic table into the current form is an astonishing achievement. Cerium is the second element in the lanthanide series. Each symbol consists of one or two letters that are derived from the element’s name in English, Latin, or other languages. (Ce) Cerium is a chemical element of the periodic table with chemical symbol Ce and atomic number 58 with an atomic weight of 140. It has 58 protons in its nucleus, meaning it is the 58th element on the periodic table. TEACHER. It is a silvery-white metal in the actinide series of the periodic table. 8. 118. In this article, I have discussed in detail how to easily write the complete electron configuration of cerium. Symbol: Ho Atomic Weight: 164. Visit BYJU’S to learn Symbols, Atomic Number, Atomic Mass, Groups, Videos with FAQs of Periodic Table Elements. Ionization Energies: The first ionization energy of Cerium is about 534. Options for hiding the symbol or name of the elements provide a handy learning aid for memorizing the periodic table. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Since it is the outermost (valence) electrons which are primarily involved in chemical interactions between atoms, the last electron added to an atom in the building-up process is of far more interest to a chemist than the first. Nov 13, 2020 · Because of this, the first two rows of the periodic table are labeled the s block. It is added to food and used to de-ice roads in winter. Jun 23, 2021 · A periodic table group is a column, while a periodic table period is a row. Shell structure: 2. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The sum of the number of protons and neutrons of an atomic nucleus. 5 picometers (pm), which is typical for lanthanides and reflects its size relative to other elements in the periodic table. Up to date, curated data provided by Mathematica 's ElementData function from Wolfram Research, Inc. 19. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. Cerium is a classified lanthanide element. Like silicon, germanium naturally reacts and forms Nov 21, 2023 · Lanthanum (Symbol: La) Cerium (Symbol: Ce) Praseodymium (Symbol: Pr) Neodymium (Symbol: Nd) Holmium is a chemical element represented by the symbol Ho, on the periodic table. The lanthanides are a series of periodic table elements including elements 57 to 71 (lanthanum to lutetium). The planet itself was discovered 2 years earlier. It is used for jewellery and silver tableware, where appearance is important. Sterling silver contains 92. Guess the atomic symbols. Please note that the chemical formula is not limited to the known chemical compounds. 0 license and was authored, remixed, and/or curated by LibreTexts. The periodic table of Periodic Table of Elements (Interactive) [PDF] - This Interactive Periodic Table is a tabular arrangement of the chemical elements, organized based on chemical element names, symbols, atomic masses, electron configuration and other chemical properties. Some of these names date from antiquity, while others are quite new. A modern version is shown in Figure 1. 5% silver. Both β and γ quite stable at room temperature. May 17, 2014 · Here is a list of elements of the periodic table, their atomic numbers, and element symbols. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number —i. Click the tabs at the top to explore each section. 16g/cm 3. While these metals can be considered transition metals, they have properties Answer: Ce is the symbol for the element cerium on the periodic table. Cadmium is a chemical element with atomic number 48 which means there are 48 protons in its nucleus. The atomic radius of a chemical element is a measure of the size of its atom, usually, the distance from the center of the nucleus to the outermost isolated electron. Minerals such as monazite and bastnasite contain cerium. α- cerium is stable below -150 o C. Periodic Table. Question: What is the chemical element for the symbol Sb? Answer: Sb is the symbol for the element antimony on the periodic table. 4 kJ/mol, which is the energy required to remove the most loosely bound electron from an atom Jul 26, 2014 · By Martin in Pronunciation, Scientific English Tag chemical elements, copper, iron, lead, listen, pronunciation. Atomic number Symbol Name Relative atomic mass Electronegativity 1 H Hydrogen 1,01 58 Ce Cerium 140 In physics, a period is always the same duration — by definition. Periods increase by double the sequence of odd numbers. Get the facts about Nov 21, 2020 · Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. In chemistry, the number of elements in a period changes according to a sequence that only a mathematician could love. It is a metal that belongs to the first transition series and group 8 of the periodic table. Elements which are often pronounced incorrectly are highlighted in red. It has an atomic weight of 55. Cerium is the 58th element of the periodic table so its atomic number is 58. Iron is a chemical element. 5. However, the Periodic table generally displays only the symbol of the element and not its entire name. Chemists refer to these 15 elements using the symbol Ln. Cerium is solid at room temperature. From Wikipedia, the free encyclopedia Uranium is a chemical element with symbol U and atomic number 92. Ceric sulfate (Ce (So 4) 2) is used in some chemical analysis processes. 69. 116 u and is classed as lanthanide. Aug 16, 2021 · So, we basically have the Cerium electron configuration is [Xe] 4f¹ 5d¹ 6s² in the short form for the understanding of our readers. Malleable, ductile, iron-gray metal. Neutron number plus atomic number equals atomic mass number: N+Z=A. Only europium is more reactive than cerium among rare earth elements. Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. The list is ordered by increasing atomic number, which is the number of protons in an atom of that element. The ground state electronic configuration of neutral cerium is [ Xe ]. Feb 28, 2024 · To that end, here is a full list of periodic table two-letter symbols for Rule 12 of The Password Game. Get the Blue Marble periodic table poster! Click on an element to see its history, description, benefits, sources and biological rating. 石田. The International Union of Pure and Applied Chemistry (IUPAC) confirmed the names of elements 113, 115, 117, and 118 as: Nihonium (symbol Nh), for element 113. In other words, it's the sum of the number of nucleons in an atom. This periodic table is created by Dr Kaisa Helttunen and Heikki Nov 21, 2020 · Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. 9amu 69. Elements in the same group share similar characteristics, like reactivity. 4f1. They are called “lanthanides” because they share properties in common with lanthanum. Jun 30, 2023 · London: Macmillan Education Ltd, 1991. Here's a list of all of the chemical elements of the periodic table ordered by increasing atomic number. Mar 27, 2023 · Cerium is a classified lanthanide element and its symbol is ‘Ce’. Other cerium compounds are used to make some types of glass as well as to remove color from glass. Cerium melting point is 795 O C. 2. Feb 4, 2021 · The lanthanides or lanthanoids are elements 57 (lanthanum) to element 71 (lutetium). Aug 11, 2023 · Cesium is a soft metal at room temperature (it is soft like wax). Beryllium is a chemical element of the periodic table with chemical symbol Be and atomic number 4 with an atomic weight of 9. Elements: The Periodic Table provides comprehensive and useful information about the chemical elements all in one place. Most abundant rare earth metal. Jun 20, 2023 · Example \(\PageIndex{1}\): Electron Configuration. 0046 percent of the Earth's crust, making it the most often found rare metal on the planet. e. Study with Quizlet and memorize flashcards containing terms like Actinium, Aluminum, Americium and more. Name: Cerium Symbol: Ce Atomic number: 58 Atomic weight: 140. The Royal Society of Chemistry's interactive periodic table features history, alchemy, podcasts, videos, and data trends across the periodic table. The atomic number of an element is equal to the number of protons and electrons in that element. 1, reacts readily with metals to form compounds that can be broadly classified as salts and, therefore, are known as the halogens, which is derived from a combination of Greek words that translate to "salt makers. It has the symbol Ce. The chemical symbol for Lead is Pb. Larger blocks are used for sparking special effects. Jun 30, 2023 · Cerium is a chemical element with the atomic number 58 and is represented by the symbol ‘Ce’ in the periodic table. Quiz by tmaster52. Most periodic tables provide additional data (such as atomic mass) in a box that contains each element’s symbol. 8. The melting point of cesium is 28. This followed a 5-month period of public review after which the names earlier proposed by the discoverers were approved by IUPAC. It’s labeled with the symbol Ce, and has the atomic number 58, atomic mass of 140. Periodic tables comprise 118 specifically-arranged boxes—each filled with precise numbers and symbols—so it’s best to start with a fully-vetted finished product. The periodic table organizes elements into groups and periods based on their chemical and physical properties. Click on the column header to sort the table by that column or click on an element name to get detailed facts about the element. . The rest is copper or some other metal. What is the electron configuration of cerium? The total number of electrons in cerium is fifty-eight. Alkali solutions and dilute and concentrated acids attack the metal rapidly. Cerium is an iron-gray lustrous metal. You can look up element names, symbols, atomic masses and more, or test your knowledge with a periodic table game. The nucleus is composed of protons and neutrons. 90% of all metal that is refined today is iron. Block Dec 26, 2023 · The symbols in the periodic table represent the different elements. Key groups include alkali metals, alkaline earth metals Cerium was discovered in Sweden by Jöns Jakob Berzelius and Wilhelm Hisinger, and independently in Germany by Martin Heinrich Klaproth, both in 1803. The chemical symbol for Cerium is Ce. Cerium chemical symbol is Ce, its atomic number is 58. , the total number of protons in the atomic nucleus. Period A horizontal row in the periodic table. It is located in group eight, period four and block d of the periodic table. Period in periodic table: 6 (lanthanoid) Block in periodic table: f. Notes on the properties of Cerium: Specific Heat: Value given for solid phase. Nihonium (symbol Nh), for element 113. It decomposes slowly in cold water and rapidly in hot water. The ground state electron configuration of ground state gaseous neutral cerium is [ Xe ]. PubChem is a reliable source of chemical information from authoritative sources. It tarnishes readily in the air. Biological role. 18. Cerium is a Lanthanide element. It has symbol Fe (from Latin ferrum 'iron') and atomic number 26. Except for europium, cerium is the most reactive of the rare-earth metals. 5d1. Members of a group typically have similar properties and electron configurations in their outer shell. 116. Og. qp ws ha xu oz ub yw yi py uc