Each subshell is separated by an electron orbital. This is the final orbital diagram of selenium as we have used all 34 electrons. How do I align things in the following tabular environment? How many orbitals are possible at this level? Selenium atoms exhibit -2, +2, +4, +6 oxidation states. For the third shell, $n=3$, so the allowed values of $\ell$ are: $\ell=0$, which is the $s$ subshell, $\ell=1$, which is the $p$ subshell, and $\ell=2$, which is the $d$ subshell. The 2s orbital would be filled before the 2p orbital because orbitals that are lower in energy are filled first. 3d 10 4s 2 4p 3: 34: Se: Selenium: p-block [Ar] 3d 10 4s 2 4p 4: 35: Br: Bromine: p . The electrons in the atomic orbitals are filled up according to the following principles. By looking at the electron configuration of selenium, it is possible to determine how many electrons are in each sub-shell. The concept of electronic configuration has replaced the older concept of valency and valence electrons. Ques. electron configuration 7 a in the orbital diagram for oxygen in model 2 how many electrons are . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. According to Hund's principle, the first electron will enter in the clockwise direction and the next electron will enter the 1s orbital in the anti-clockwise direction. The s subshell can have a maximum of 2 electrons as it has only 1 orbital. So draw two arrows in the 3s box showing two electrons as follows: 3p6 indicates that the 3p subshell has 6 electrons. How do you write the full electron configuration for selenium?Ans:1s22s22p63s23p63d104s24p4. Chlorine has an atomic number of 17, implying that a chlorine atom has 17 electrons. Within each subshell, electrons are grouped into orbitals, . Best Fully Loaded Android Tv Box, Air Carrier Operating Certificate, Happy Lunch Containers, Indie Press Revolution, 3m Rocker Panel Coating Black, Situs Address Definition, Windows Remote Assistance Windows 10, Peak Battery Charger Not Charging, Club Wyndham Ownership Levels, Sulfur Corrosion Stainless Steel, Motorcycle Lithium Battery Charger, Farm Production And Conservation Business Center . Thus, to find the number of electrons possible per shell. So its p subshell will be fully paired. The periodic table distinguishes four types of elements based on their electronic configurations. l = 2 ml = { 2, 1,0, + 1, +2} You can thus say that the d subshells, which can be found in an atom starting with the third energy level, contain five d orbitals. This means that for a d subshell , the magnetic quantum number can take 5 possible values. We can think of an atom like a hotel. Angular nodes are typically flat plane (at fixed angles), like those in the diagram above. The elements that receive electrons and form bonds are called anions. For example, the electron configuration of Sodiumis 1s22s22p63s1. Save my name, email, and website in this browser for the next time I comment. The 3d, 4d etc., can each hold ten electrons, because they each have five orbitals, and each orbital can hold two electrons (5*2=10). 1s is the closest and lowest energy orbital to the nucleus. Note:The short electron configuration of selenium is [Ar] 3d104s24p4. Have you learned about quantum numbers yet? The energy of an orbital is calculated by adding the principal and azimuthal quantum numbers. Any electron present in an atom can be described by a combination of these four numbers. The second shell has 2 subshells: the $s$ subshell, which has 1 orbital with 2 electrons, and the $p$ subshell, which has 3 orbitals with 6 electrons, for a total of 4 orbitals and 8 electrons. What will bethe total number of electrons that can be filled in s, p, and d subshell? 6. The sub-energy level s can hold a maximum of two electrons, p can hold a maximum of six electrons, d can hold a maximum of ten electrons, and f can hold a maximum of fourteen electrons. Determine the number of angular and radial nodes of a 4f orbital. Thus, the second shell can have 8 electrons. What is the difference between your two methods? This means that the s orbital can contain up to two electrons, the p orbital can contain up to six electrons, the d orbital can contain up to 10 electrons, and the f orbital can contain up to 14 electrons. The principal quantum number is the floor number, the subshell type lets us know what type of room it is (s being a closet, p being a single room, d having two adjoining rooms, and f being a suit with three rooms) , the magnetic quantum number lets us know how many beds there are in the room, and two electrons can sleep in one bed (this is because each has a different spin; -1/2 and 1/2). However, the electron can exist in spin up (ms = +1/2) or with spin down (ms = -1/2) configurations. 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p There are no known elements that, in their ground state, have electrons in a subshell beyond 7p. This can be seen in Figure \(\PageIndex{1}\). Electron configuration describes how electrons are distributed in its atomic subshell. Why is the configuration of electrons in elements important? What are the maximum number of electrons in each shell? So, the remaining electrons will enter the third orbit. So, the remaining four electrons enter the 4p orbital. There's an important distinction between "the number of electrons possible in a shell" and "the number of valence electrons possible for a period of elements". (2 marks), Ans. This notation for the distribution of electrons in atomic orbitals came into use shortly after Ernest Rutherford and Niels Bohr presented the Bohr model of the atom in 1913. It only takes a minute to sign up. Experts are tested by Chegg as specialists in their subject area. Electron configurations help determine an atom's valence electrons, which provides insight into its chemical behaviour. Step #1: find electrons of selenium Step #2: write electron configuration of selenium Step #3: draw orbital diagram of selenium Let's break down each step in detail. The electron configuration of a selenium atom can be done in two ways. The three rules that must be followed while writingelectronic configuration of elementsare: Ques. The Aufbau method is to do electron configuration through the sub-energy level. Do really the electrons could only orbit in specific orbits with a fixed radius? Ans. This configuration conveys a lot of important information about an element. These sub-energy levels are also called orbital. Ques. Now, the #4p# subshell contains a total of three #4p# orbitals, #4p_x#, #4p_y#, and #4p_z#. Ques. Using indicator constraint with two variables, Doesn't analytically integrate sensibly let alone correctly. In selenium, the first energy level has two electrons in sub-shell s. Therefore, the selenium full electron configuration will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4. To create an orbital diagram of an atom, you first need to know Hunds principle and Paulis exclusion principle. So draw four arrows in the 4p box showing four electrons as follows: Thats it! The 1s orbital is now filled with two electrons. The fourth shell has 4 subshells: the $s$ subshell, which has 1 orbital with 2 electrons, the $p$ subshell, which has 3 orbitals with 6 electrons, the $d$ subshell, which has 5 orbitals with 10 electrons, and the $f$ subshell, which has 7 orbitals with 14 electrons, for a total of 16 orbitals and 32 electrons. A #4p# orbital, which is part of the #p# subshell located on the fourth energy level, can hold a maximum of two electrons. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. As discussed in the previous section, the magnetic quantum number (ml) can range from l to +l. (2 marks). This is shown in the atomic orbital diagram. The 4p orbital holds 6 electrons. Also, you should know the number of orbitals in each subshell. These labels include the shell number (given by the principal quantum number), the subshell name (given by the azimuthal quantum number), and the total number of electrons in the subshell in superscript. That is, selenium is an anion element. The second floor has the room styles s and p. The s is a closet with one bed as we know and the p room is a single with three beds in it so the second floor can hold a total of 8 electrons. (a) Determine the final velocity of the blocks. For example, on the first floor we have the s orbital. The Aufbau principle is that the electrons present in the atom will first complete the lowest energy orbital and then gradually continue to complete the higher energy orbital. Electrons in an orbital with l = 2 are in a (n) d orbital. The electrons are arranged in four subshells namely s,p, d and f. The electron configuration of each atom is represented by following a standard notation. Bulk update symbol size units from mm to map units in rule-based symbology. This would mean 2 electrons could fit in the first shell, 8 could fit in the second shell, 18 in the third shell, and 32 in the fourth shell. Is it possible to create a concave light? The 2p, 3p, 4p, etc., can each hold six electrons because they each have three orbitals, that can hold two electrons each (3*2=6). 3rd ed. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Each orbital has a capacity of two electrons. Since Cl- has one electron extra. For the first shell, $n=1$, so only one value of $\ell$ is allowed: $\ell=0$, which is the $s$ subshell. Px, Py, Pz. Also discussed is how to draw and write the orbital diagram of selenium. Electrons are found within the lobes. When walking up stairs, you place one foot on the first stair and then another foot on the second stair. The 4 th energy level contains 4s and 4p subshells. Each letter is paired with a specific value: An orbital is also described by its magnetic quantum number (m). The values of $n$ are integers: $n=1,2,3,$, $\ell$, the orbital angular momentum quantum number defines the subshell. We know that the subshell has 1 orbital. A 4.0-kg block moving at 2.0 m/s west on a frictionless surface collides totally inelastically with a second 1.0-kg block traveling east at 3.0 m/s. Write the abbreviated electron configuration for the following ion, and indicate if it has a noble-gas configuration. I am fairly sure that orbitals and shells are the same thing. For instance, if two electrons are filled in the first shell's 's' subshell, the resulting notation is '1s, With the help of these subshell labels, the electron configuration of magnesium (atomic number 12) can be written as 1s, This principle is named after the German word 'Aufbeen,' which means 'to build up.'. The important terms that are related to electron configuration writing are as follows. It also aids in the categorization of elements into various blocks (such as the s-block elements, the p-block elements, the d-block elements, and the f-block elements). How can this new ban on drag possibly be considered constitutional? Each of these lobes is labeled differently and is named depending on which plane the lobe is resting in. What is the charge on the monatomic ion of nitrogen, the nitride ion? So each s subshell has one orbital, each p subshell has three orbitals, each d subshell has five orbitals, and each f subshell has seven orbitals. We've added a "Necessary cookies only" option to the cookie consent popup, Noble gas configuration and valence shell electrons, How to determine the number of electron in a shell. Ans. The third shell can carry up 18 electrons, but it is more stable by carrying only eight electrons. However, electrons will never be found in between two orbitals. 2S b. n=3, l=2 c. 6d; How many electrons in an atom can have each of the following quantum number or sublevel designations? As a result, if two electrons have the same principle, azimuthal, and magnetic numbers, they must have opposite spins. How many electrons are in the 4p subshell of selenium? (Fr has the lowest ionization energy and F has the highest ionization energy), Which of these elements has the greatest electron affinity (largest positive value)? This number indicates how many orbitals there are and thus how many electrons can reside in each atom. Hydrogen's electron configuration is 1s1, as shown below: The atomic number of oxygen is 8, which means that each oxygen atom contains 8 electrons. This configuration shows how the 53 electrons of the iodine atom are distributed among the various . Multiple Choice 7. Calculate the molar concentration of chloride ions [ Cl ] ( mol / L ) in a solution prepared by mixing 100 . The method of entering electrons into orbitals through the Aufbau principle is 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d. The Aufbau principle states that electrons will occupy lower energy orbitals before moving on to higher energy orbitals. Therefore, the order of the number of electrons in each shell of the selenium(Se) atom is 2, 8, 18, 6. Sr(NO3)2\mathrm{Sr}\left(\mathrm{NO}_{3}\right)_{2}Sr(NO3)2. level 2 (shell 2) has two subshells. At any point in time, you can either stand with both feet on the first stair, or on the second stair but it is impossible to stand in between the two stairs. The energy of an orbital is calculated from the value of the principal quantum number n and the azimuthal quantum number l. Each orbital, as previously mentioned, has its own energy level associated to it. So draw two arrows in the 1s box showing two electrons as follows: 2s2 indicates that the 2s subshell has 2 electrons. What are the number of sub-levels and electrons for the first four principal quantum numbers? How to write the orbital diagram for selenium? Then the correct electron configuration of selenium in the ground state will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4px2 4py1 4pz1. It is positioned based on the energy of. This means that the 1s, 2s, 3s, 4s, etc., can each hold two electrons because they each have only one orbital. Twelve electrons over the electron configuration of argon reach the . He provided a model of the atom in 1913. As mentioned above, the electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. Hunds principle is that electrons in different orbitals with the same energy would be positioned in such a way that they could be in the unpaired state of maximum number and the spin of the unpaired electrons will be one-way. The serial number of the orbit]. Electrons are filled in the following order, according to this principle: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p Ans. (3 marks). (Cl-. The first ionisation potential (in eV) of Be and B, respectively are, Identify the wrong statement in the following, Among the elementsCa,Mg,P and Cl, the order of increasing atomic radii is. { Atomic_Spectra : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Connecting_Electronic_Configurations_to_the_Periodic_Table : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Electronic_Orbitals : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Electron_Spin : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Multi-electron_Atoms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Quantum_Theory : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Uncertainty_Principle : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Wave-Particle_Duality" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Wave-Particle_Duality_II" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "Case_Study:_Quarks_and_other_sub-Nucleon_Particles" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Electrons_in_Atoms : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Why_atoms_do_not_Collapse : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, [ "article:topic", "showtoc:no", "license:ccbyncsa", "licenseversion:40" ], https://chem.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FBookshelves%2FPhysical_and_Theoretical_Chemistry_Textbook_Maps%2FSupplemental_Modules_(Physical_and_Theoretical_Chemistry)%2FQuantum_Mechanics%2F09._The_Hydrogen_Atom%2FAtomic_Theory%2FElectrons_in_Atoms%2FElectronic_Orbitals, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), Quantum Numbers describing Electronic Orbitals, status page at https://status.libretexts.org. The 3p orbital is now full. Selenium excited state electron configuration, Selenium ion(Se2-) electron configuration, electron configuration of all the elements, Californium(Cf) electron configuration and orbital diagram, Rhodium(Rh) electron configuration and orbital diagram, Molybdenum(Mo) electron configuration and orbital diagram, Thorium(Th) electron configuration and orbital diagram, Carbon(C) electron configuration and orbital diagram, Platinum(Pt) electron configuration and orbital diagram, Electron configuration through orbit(Bohr principle), Electron configuration through orbital(Aufbau principle). What exactly is an element's electron configuration? par | Juil 3, 2022 | dining in the dark philadelphia 2021 | what does giving neck mean sexually | Juil 3, 2022 | dining in the dark philadelphia 2021 | what does giving neck mean sexually Each orbital can accommodate a maximum of 2 electrons. The first two electrons of selenium enter the 1s orbital. Chemists describe the shell and subshell in which an orbital belongs with a two-character code such as 2 p or 4 f. The first character indicates the shell ( n = 2 or n = 4). Which orbital would the electrons fill first? Electron configuration through orbitals follows different principles. The orbital shapes start to get weird after that. Aufbau is a German word, which means building up. For n=3 energy level we have three subshells- s,p and d subshells. There are five sub-shells, but only four of them are used by naturally occurring elements: s, p, d and f. Each sub-shell accommodates a certain number of electrons. Also, note that Brian's answer is good and takes a different approach. The atomic number of selenium represents the total number of electrons of selenium. In fact, any orbital, regardless of its energy level, subshell, and orientation, can hold a maximum of two electrons, one having spin-up and one having spin-down. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Ques. Required fields are marked *. a. As a result, the Ne electron configuration is 1s2 2s2 2p6. The total number of nodes present in this orbital is equal to n-1. How many electrons are in the 4p subshell of a selenium atom? All orbitals are completely filled except the 3d orbitals. How many electrons can the 4p subshell hold for an atom? Geometry optimization (full relaxation) at 0 K was performed at the -point of BZ with E cutoff = 330 eV. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. The electrons are filled in the following order: Therefore, the electron configuration of oxygen is 1s2 2s2 2p4 as shown below: Magnesium has an atomic number of 12. The EC can be written as 1s2 2s2 2p6 3s22. (2 marks). Write the ground-state electron configuration for S2-. Now, the 4p subshell contains a total of three 4p orbitals, 4px, 4py, and 4pz. For the values of l, 0 corresponds to the s subshell, 1 corresponds to the p subshell, 2 corresponds to d, and 3 corresponds to f. Each subshell is divided into orbitals, and these orbitals have . Define Pauli Exclusion Principle. For the second shell, $n=2$, so the allowed values of $\ell$ are: $\ell=0$, which is the $s$ subshell, and $\ell=1$, which is the $p$ subshell. Which one of the following ions will be smallest in size? Write the electronic configuration of Cl- ion. Key Terms: Electron Configuration, Electrons, Subshell, Atomic Orbitals, Quantum Number, Aufbau Principle, Hunds Rule,Electronic Configuration. The 3d, 4d etc., can each hold ten electrons, because they each have five orbitals, and each orbital can hold two electrons (5*2=10). You enter 4 in for "n" and you will get 32 electrons. Predicting a group of elements' properties (elements with similar electron configurations tend to exhibit similar properties). So, the next three electrons will enter the 4p orbital in the clockwise direction and the remaining one electron will enter the 4p orbital in the anti-clockwise direction. Then the next two electrons will enter the 3s orbital just like the 1s orbital and then the next six electrons will enter the 3p orbital just like the 2p orbital. Next, the p subshell has 6 electrons. The atomic number of selenium is 34. This quantum number defines the shape of the orbitals (probability densities) that the electrons reside in. For example, in the dyx orbital, there are nodes on planes xz and yz. Although the details of the structure of monoclinic sulphur are not well known it probably consists of, 2023 Collegedunia Web Pvt. Electron Configuration For Selenium Selenium consists of 34 electrons distribution in its 4 orbits. The Aufbau method is to do electron configuration through the sub-energy level. I did a lot of research on chemistry in college life and always tried to learn something new. Of these colors, _______ has the most energy. Therefore, the valence electrons of selenium are six. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill. Therefore, the formula $2n^2$ holds! Which has been discussed in detail above. The remaining six electrons will be allocated to the 2p orbital. He has a good conceptual knowledge on different educational topics and he provides the same on this website. Ans. An example is the 2p orbital: 2px has the same energy level as 2py. How many valence electron does a carbon atom have? So, the electron will enter the 4s orbital first and enter the 3d orbital when the 4s orbital is full. The general electron configuration for atoms of the halogen group is, In what group of the periodic table is the element with the electron configuration [Ar]4s^2 3d^10 4p^3. Tabulated below is theelectronic configuration of the first 20 elements of the periodic table: NCERT Solutions for:Classification of Elements & Periodicity Properties, Ques. In my textbook, it says that the maximum number of electrons that can fit in any given shell is given by 2n. Because each orbital is different, they are assigned specific quantum numbers: 1s, 2s, 2p 3s, 3p,4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p. General Chemistry Principles & Modern Applications. The maximum number of electrons that can be accommodated in a shell (n) is determined by the principal quantum number. How does an atomic orbital differ from a Bohr orbit? How many electrons are in the 4p subshell of selenium? How many electrons does selenium have?Ans:34 electrons. In the above electron configuration, the highest energy level (4) is marked with green color. In this case, 3-1=2, so there are 2 total nodes. The next three electrons will enter the 2p orbital in the clockwise direction and the next three electrons will enter the 2p orbital in the anti-clockwise direction. First, we look at the n=1 shell (the first shell). 1 N n. 8 3 4 1A BA 1 H PERIODIC TABLE OF THE ELEMENTS 2 He 1.000 2A 3A 4A 5A 6A 7A 4.003 4 5 6 7 8 o 10 Be B N F Ne 6941 9.012 10.81 1201 14.01 16.00 19.00 20.18 12 13 14 15 16 17 18 Na Mg AI SI P S a Ar 22.99 24.31 26.98 28.09 30.97 32.07 36.45 32.95 19 20 21 22 23 24 25 26 27 28 29 30 31 32 34 35 36 K Ca SC TI V Cr Mn Fe NI Zn Ga GE AS Se Br Kr 30.10 40.00 44.96 47.87 50.94 52.00 54.94 55.85 58.93 58.60 63.55 65.30 69.72 7261 74.92 78.96 79.90 83.80 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo TC Ru Rh Pd Ag Cd In Sn Sb Te 1 Xe 85.47 87.62 88.91 91.22 82.91 95.94 (98) 101.07 102.91 106.42 107.87 112.41 114.82 118.71 121.76 127.60 126.30 131.29 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 36 CS Ba La Hf Ta w Re Os Ir Pt Au Hg TI Pb BI At Rn 132.91 137.39 136.91 178.49 180.95 183.84 185 21 190 23 192.22 196.08 156.97 200.59 204.38 207.19200.98 (209) (210) 87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 116 Fr Ra Rf Db Sg Bh Hs Mt Ds Rg FeF2004 Feb 2018 (226) (261) (206) (267) (208) (271) (280) (285) (284) (289 (288) (280) 7 58 Ge 59 Pr 60 Nd 61 Pm 62 Sm 63 Fu 64 ca B5 Th 66 Dy 67 Ho 68 Fr 69 Tim 70 Yb LU.