The atomic number of selenium represents the total number of electrons of selenium. Because the 1s orbital can only hold two electrons, the next two electrons for Ne are placed in the 2s orbital. "After the incident", I started to be more careful not to trip over things. How many electrons are in the 4p subshell of selenium? The Pauli exclusion principle states that no two electrons can have the same exact orbital configuration; in other words, the same quantum numbers. What is Chlorine's Electron Configuration and how do you write it? Each subshell is separated by an electron orbital. The electron configuration for selenium is 1s22s22p63s23p64s23d104p4. Ans. What are the number of sub-levels and electrons for the first four principal quantum numbers? These orbits are expressed by n. [n = 1,2,3,4 . This is clearly shown in the figure of the orbital diagram of selenium. This pattern will give you the correct configuration for all but about 19 elements. So draw two arrows in the 3s box showing two electrons as follows: 3p6 indicates that the 3p subshell has 6 electrons. I used to enjoy chemistry from school life. The 3d orbital is now full. Thus, to find the number of electrons possible per shell The second character identifies the subshell. So draw six arrows in the 3p box showing six electrons as follows: 4s2 indicates that the 4s subshell has 2 electrons. Also, note that Brian's answer is good and takes a different approach. Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. Ans. As a result, the Ne electron configuration is 1s2 2s2 2p6. . The total number of electrons in selenium is thirty-four. Which of these atoms has the smallest atomic radius? The electron configuration of a selenium atom can be done in two ways. Electrons can be arranged correctly through orbits from elements 1 to 18. This is shown in the atomic orbital diagram. 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 . What is the difference between your two methods? Finally, the fourth energy level has a total of six electrons. The sub-energy levels depend on the azimuthal quantum number. This concept becomes more important when dealing with molecular orbitals. See all questions in Orbitals, and Probability Patterns. a. are known. Bulk update symbol size units from mm to map units in rule-based symbology. Wiki User 2008-12-11 02:55:57. Atomic energy shells are subdivided into sub-energy levels. The values of $n$ are integers: $n=1,2,3,$, $\ell$, the orbital angular momentum quantum number defines the subshell. around the world. 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. Also discussed is how to draw and write the orbital diagram of selenium. The valency of the element is determined by electron configuration in the excited state. So it represent 4p represent the p orbital of 4th . The electrons in a particular subshell may be distributed among volumes of space of equal energies called orbitals. 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 concept of electronic configuration has replaced the older concept of valency and valence electrons. Write the electronic configurations Fe2+ and find the total number of unpaired electrons in its ground state. How many electrons does a sulfur atom need to fill its outermost s and p subshells? Thus n=1 shell can hold two electrons. Multiple Choice 7. Ques. An example is the 2p orbital: 2px has the same energy level as 2py. This is the case because according to the Pauli Exclusion Principle, two electrons located in an atom cannot share a complete set of four quantum numbers. The 3p orbital is now full. Hopefully, after reading this article you will know the details about this topic. A completely full or half-full d sub-level is more stable than a partially filled d sublevel in these cases, so an electron from the 4s orbital is excited and rises to the 3d orbital. Each has its own specific energy level and properties. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill. Legal. So draw ten arrows in the 3d box showing ten electrons as follows: 4p4 indicates that the 4p subshell has 4 electrons. Batch split images vertically in half, sequentially numbering the output files. What is \newluafunction? So, if there are open orbitals in the same energy level, the electrons will fill each orbital singly before filling the orbital with two electrons. How do I align things in the following tabular environment? Connect and share knowledge within a single location that is structured and easy to search. So in this case, the valency of selenium is 2. The 4s orbital is now full. 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 . The s orbital is a closet and has one bed in it so the first floor can hold a total of two electrons. Before drawing the orbital diagram, you should know the three general rules. For example, the 2p shell has three p orbitals. So, the next six electrons enter the 2p orbital. So, the valency of selenium is 4. 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. USA: Linus Pauling, 1947. atom this electron must go into the lowest energy subshell available the 3 s orbital giving a 1 s 2 2 s 2 2 p 6 3 s 1 configuration , referring to figure 2 1 1 draw an orbital diagram to represent those valence orbitals following hunds rule place . How many electrons can the 4p subshell hold for an atom? Identify each substance as a molecular compound or an ionic compound, and then calculate its molar mass. Each orbital has a capacity of two 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). This is the way electrons move from one electron orbital to the next. I am in high school so please try to simplify your answer and use fairly basic terms. The second orbit is now full. The values of $m_s$ are $m_s=\pm \frac{1}{2}$. Electrons, however, are not simply floating within the atom; instead, they are fixed within electronic orbitals. Geometry optimization (full relaxation) at 0 K was performed at the -point of BZ with E cutoff = 330 eV. These sub-energy levels are also called orbital. Which of these two methods is correct and should be used to find the number of electrons in an orbital? A single orbital can only hold 2 electrons, therefore the s subshell has 1 orbital. He provided a model of the atom in 1913. Hence the electronic configuration for Cl- ion will be. The important terms that are related to electron configuration writing are as follows. 6. 8 Multiple Choice 2 8 00:09:34 O 4 eBook 0 5 2 How many of valence electrons do the element in column. The third shell can carry up 18 electrons, but it is more stable by carrying only eight electrons. According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p An orbital can only hold two electrons with opposite spins, according to the, This principle can be stated another way: ". 5. In terms of quantum numbers, electrons in different shells will have different values of principal quantum number n. So another kind of orbitals (s, p, d, f) becomes available as we go to a shell with higher n. The number in front of the letter signifies which shell the orbital(s) are in. The energy of an orbital is calculated by adding the principal and azimuthal quantum numbers. Chromium atoms have 24 electrons and 24 protons with the most abundant isotope having 28 neutrons. The elements that receive electrons and form bonds are called anions. The 3d orbital is now full. Of these colors, _______ has the most energy. 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). IfA0 5. How many valence electrons does selenium have?Ans:Six valence electrons. Quality education can build a beautiful society. The ground state electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4. (Al, P, As, Sb, Na), Which one of these ions has the largest ionic radius? For example, on the first floor we have the s orbital. You enter 4 in for "n" and you will get 32 electrons. Im Farhan Sadik. The 2s or 2p orbital? The d subshell can hold a maximum of 10 electrons. Since electrons all have the same charge, they stay as far away as possible because of repulsion. In the selenium ground-state electron configuration, the last four electrons of the 4p orbital are located in the 4px(2), 4py and 4pz orbitals. 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. There is a formula for obtaining the maximum number of electrons for each shell which is given by $2n^2~\ldots$ where n is the position of a certain shell. How many electrons can occupy the 4d subshell? The first shell can carry up to two electrons, the second shell can carry up to eight electrons. 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. The electron configuration for cobalt (II) ion is? Ques. The number of atomic orbitals in a d subshell is. The third shell has 3 subshells: the $s$ subshell, which has 1 orbital with 2 electrons, the $p$ subshell, which has 3 orbitals with 6 electrons, and the $d$ subshell, which has 5 orbitals with 10 electrons, for a total of 9 orbitals and 18 electrons. 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. 2. Each orbital, as previously mentioned, has its own energy level associated to it. The main proponents of this principle are scientists Niels Bohr and Pauli. Or As a result, an electron in the 4px orbital jumps to the 4dxy1 orbital. With regard to electron behavior, when an electron transitions from a higher level, Energy must be lost, a photon of light is emitted, The number of atomic orbitals in a d subshell is, Electrons in an orbital with l = 2 are in a(n). How many orbitals are possible at this level? What subshells are possible in n=3 energy level? This can be seen in Figure \(\PageIndex{1}\). Therefore, the selenium full electron configuration will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4. Have you learned about quantum numbers yet? So, the remaining four electrons enter the 4p orbital. How to handle a hobby that makes income in US. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. Ques. (3 marks). Which means that the p subshell has 3 orbitals. Ques. And Paulis exclusion principle is that the value of four quantum numbers of two electrons in an atom cannot be the same. For the fourth shell, $n=4$, so the allowed values of $\ell$ are: $\ell=0$, which is the $s$ subshell, $\ell=1$, which is the $p$ subshell, $\ell=2$, which is the $d$ subshell, and $\ell=3$, which is the $f$ subshell. Ans. Electron configuration through orbitals follows different principles. (c) What happens to the difference in kinetic energies in this process? However, the outcome is the following: Each energy level (shell) has more subshells available to it: The pattern is thus: $2, 8, 18, 32, 50, 72, $ or $2n^2$. 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. 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. Px, Py, Pz. 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. Hunds rule specifies the order in which electrons are filled in all subshell orbitals. Which of the following has magic number of protons and neutrons? So draw four arrows in the 4p box showing four electrons as follows: Thats it! It states that before a second electron is filled in an orbital, every orbital in a given subshell is singly occupied by electrons. Ques. How does an atomic orbital differ from a Bohr orbit? Carbon, for example, has the electronic configuration 1s2 2s2 2p2 (atomic number: 6). If the lobe lies along the x plane, then it is labeled with an x, as in 2px. The most probable region of electron rotation around the nucleus is called the orbital. Writing the electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 3 or [Ar] 3d 10 4s 2 4p 3. selenium (Z=34 . How many electrons are in the 4p subshell of selenium? Atoms can jump from one orbital to another orbital in an excited state. Twelve electrons over the electron configuration of argon reach the . What is the shape of an orbital with 4 radial nodes and 1 angular node in the xy plane? There's space for $18 \text{e}^-$ in the 3rd shell: $3s + 3p + 3d = 2 + 6 + 10 = 18$, however, elements in the 3rd period only have up to 8 valence electrons. After the 3d sublevel is filled, additional electrons will occupy the 4p orbitals, for a total of 6 electrons in the 4p sublevel. m L of a 1.5 M CaCl 2 solution . This article discusses in detail how to easily write the complete electron configuration of selenium. Since electrons all have the same charge, they stay as far away as possible because of repulsion. Why is the configuration of electrons in elements important? All orbitals are completely filled except the 3d orbitals. The Aufbau principle is thatthe electrons present in the atom will first complete the lowest energy orbital and then gradually continue to complete the higher energy 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. What are the exceptions to electron configuration rules? As a result, if two electrons have the same principle, azimuthal, and magnetic numbers, they must have opposite spins. Which of the following does not have valence electron in3d-subshell? (Cl-. Therefore, the maximum electron holding capacity in the first shell is two, the second shell is eight and the 3rd shell can have a maximum of eighteen electrons. The first two subshells of the third shell are filled in orderfor example, the electron configuration of aluminum, with 13 electrons, is 1s 2 2s 2 2p 6 3s 2 3p 1. Why are physically impossible and logically impossible concepts considered separate in terms of probability? The shells, n values, and the total number of electrons that can be accommodated are shown in the table below: The azimuthal quantum number (denoted by 'l') determines the subshells into which electrons are distributed. We know that the subshell has 1 orbital. Are there tables of wastage rates for different fruit and veg? So electronic configuration of selenium define as: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 3d10 4p 4. However, the electron can exist in spin up (ms = +1/2) or with spin down (ms = -1/2) configurations. The electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. The general electron configuration for atoms of all elements in Group 5A is? What is the charge on the monatomic ion of nitrogen, the nitride ion? The actual filling order is more complicated. The Pauli Exclusion Principle states that no two electrons in the same atom can have the exact same set of quantum numbers. Now, the #4p# subshell contains a total of three #4p# orbitals, #4p_x#, #4p_y#, and #4p_z#. The magnetic quantum number can range from to +. Subshell labels are used to write down an atom's electron configuration. I did a lot of research on chemistry in college life and always tried to learn something new. It fills its electrons in the following order: 2 electrons in the K shell 8 electrons in the L shell 7 electrons in the M shell As a result, chlorines electron configuration is 1s2 2s2 2p6 3s2 3p5. 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. The electrons in the atomic orbitals are filled up according to the following principles. Electron Configuration describes how the electrons are distributed in an atom's orbitals. For the Nozomi from Shinagawa to Osaka, say on a Saturday afternoon, would tickets/seats typically be available - or would you need to book? The number of possible values is the number of lobes (orbitals) there are in the s, p, d, and f subshells. For example, the electron configuration of sodium is 1s, An electron in an atom is defined by a set of four, The sequence of completely filled subshells that correspond to the electronic configuration of a, As a result, sodium's abbreviated electron configuration is. Electronic orbitals are regions within the atom in which electrons have the highest probability of being found. What is the valency of selenium?Ans:The valency of selenium is 2, 4, and 6. Describe the structure and function of each type of epithelial tissue. The orbital number of the s-subshell is one, three in the p-subshell, five in the d-subshell and seven in the f-subshell. Electronic Orbitals is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts. Next, the p subshell has 6 electrons. Using quantum numbers to explain why the shells have the subshells they do and why the subshells have the number of orbitals they do. Another example is the 5dxy orbital. The Group IV and V metals can lose either the electrons from the p subshell, or from both the s and p subshells, thus attaining a pseudo-noble gas configuration. It is expressed by l. electron configuration 7 a in the orbital diagram for oxygen in model 2 how many electrons are . Hydrogen has an atomic number of one. The electrons of the atom revolve around the nucleus in a certain circular path. How many orbitals are there in the 3d subshell? So, the remaining electrons will enter the third orbit. How many electrons does selenium have?Ans:34 electrons. Thus, the second shell can have 8 electrons. General Chemistry. The Group IV - VII non-metals gain electrons until their valence shells are full (8 electrons). Write the electronic configuration of Cl- ion. In selenium, the first energy level has two electrons in sub-shell s. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. best union jobs in illinois; how to connect kindle to wifi hotspot; wood & fire neapolitan style pizza menu; leo venus and scorpio venus compatibility When n = 4, The s, p, d, and f subshells correspond to l=0, l=1, l=2, and l=3 values, respectively. The Pauli exclusion principle states that an orbital can only hold a maximum of two electrons with opposite spins. 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. The following table lists all of the possible subshells for n values up to 4: As a result, the 1p, 2d, and 3f orbitals do not exist because the value of the azimuthal quantum number is always less than the value of the principal quantum number. This is the final orbital diagram of selenium as we have used all 34 electrons. Therefore at the highest occupied principal energy level of "n = 4" the selenium atom contains: 2 electrons in a filled "4s" subshell. The total nodes of an orbital is the sum of angular and radial nodes and is given in terms of the \(n\) and \(l\) quantum number by the following equation: For example, determine the nodes in the 3pz orbital, given that n = 3 and = 1 (because it is a p orbital). The 3p orbital is now full. In chemistry sublevels refer to energies associated with electrons. The letters (s,p,d,f) represent the orbital angular momentum quantum number () and the orbital angular momentum quantum number may be 0 or a positive number, but can never be greater than n-1. The quantum number determines the number of angular nodes; there is 1 angular node, specifically on the xy plane because this is a pz orbital. 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? The maximum number of electrons that can be accommodated in a shell (n) is determined by the principal quantum number. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The lowest energy level electron orbitals are filled first and if there are more electrons after the lowest energy level is filled, they move to the next orbital. (2 marks), Ans. Hence, draw the blank orbital diagram of selenium up to 4p subshell as follows: In the above orbital diagram, the box represents an orbital. A standardized notation is used when writing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons present in the orbital written in superscript. According to the Pauli principle , no two electrons in the same atom can have the same 4 quantum numbers 31 . The distribution of electrons in an atom's orbitals is referred to as its electronic configuration. Calculate the molar concentration of chloride ions [ Cl ] ( mol / L ) in a solution prepared by mixing 100 . 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. Then two electrons will enter the 3s orbital and the next six electrons will be in the 3p orbital of the third orbit. Some images used in this set are licensed under the Creative Commons through Flickr.com.Click to see the original works with their full license. Ans. When writing an electron configuration, you have to write serially. How many d orbitals are there in the d subshell? 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. While vanadium (to the left) added one electron to its third shell, chromium adds its electron to the third shell and has one electron from the fourth shell bumped down . 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. Electron configurations help determine an atom's valence electrons, which provides insight into its chemical behaviour. The p-block elements of period 4 have their valence . Here, the energy of 4s orbital is less than that of 3d. violet. So as there are 3 orbitals so p orbital can occupy at the maximum 6 electrons regardless of principle quantum no.. 5. This electron configuration shows that the selenium ion(Se2-) acquired theelectron configuration of krypton. The 4p subshell is filled next by six electrons (Ga through Kr). For n=3 energy level we have three subshells- s,p and d subshells. The arrangement of electrons in different orbits and orbitals of an atom in a certain order is called electron configuration. (b) Determine the kinetic energy of each block before and after the collision. The periodic table distinguishes four types of elements based on their electronic configurations. Do really the electrons could only orbit in specific orbits with a fixed radius? This is demonstrated in Figure 2. For n=3, l has the values: 0,1 and 2. Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? A ground-state atom of manganese has ___ unpaired electrons and is _____. Electrons in atoms are defined by 4 quantum numbers. There are two electrons in sub-shell s and four electrons in sub-shell p. The number of electrons in all of the energy levels adds up to 34. The orbital for which the value of (n + l) is lower is the low energy orbital and the electron will enter that orbital first. The total number of nodes present in this orbital is equal to n-1. Since there are only two allowed values of spin, thus there can only be two electrons per orbital. The electron configuration of selenium is [ Ar] 4s 2 3d 10 4p 4. Each orbital can have a maximum of two electrons. Therefore, the next five electrons will enter the 3d orbital in the clockwise direction and the next five electrons will enter the 3d orbital in the anti-clockwise direction. For any atom, there are three4p orbitals. Explanation: A 4p orbital, which is part of the p subshell located on the fourth energy level, can hold a maximum of two electrons. The value of this quantum number is determined by the value of the principal quantum number, n. As a result, when n equals 4, four different subshells are possible. Save my name, email, and website in this browser for the next time I comment. Step #1: find electrons of seleniumStep #2: write electron configuration of seleniumStep #3: draw orbital diagram of selenium. During the formation of a bond, the last shell of selenium receives two electrons and turns into a selenium ion(Se2-). So the 7s orbital will be in the 7th shell. Since each of those #p# orbitals can hold a maximum of two electrons, the #p# subshell can hold a maximum of, #3 color(red)(cancel(color(black)("p orbitals"))) * "2 e"^(-)/(1color(red)(cancel(color(black)("p orbital")))) = "6 e"^(-)#. The 1s orbital is now filled with two electrons. The complete idea of the orbit is given there. The 3d orbital is now full. So, the next two electrons will enter the 4s orbital just like the 1s orbital. Therefore, the order of the number of electrons in each shell of the selenium(Se) atom is 2, 8, 18, 6. As mentioned above, the electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. The electronic configuration of each element is decided by the Aufbau principle which states that the electrons fill orbitals in order of increasing energy levels. This means there there must be two radial nodes. 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. The Aufbau method is to do electron configuration through the sub-energy level. The 2s orbital would be filled before the 2p orbital because orbitals that are lower in energy are filled first. This means that for a d subshell , the magnetic quantum number can take 5 possible values. the filled 3d subshell effectively withdraws from chemistry and the subsequent trend looks much like trends in the periods 2 and 3. Also, find the total number of unpaired electrons in its ground state. There are multiple orbitals within an atom. Protons, neutrons and electrons of all elements, Electron Configuration Calculator Get answer within 1 sec, Selenium atom electron configuration through orbit, Electron configuration of selenium through orbital. The number of radial and angular nodes can only be calculated if the principal quantum number, type of orbital (s,p,d,f), and the plane that the orbital is resting on (x,y,z, xy, etc.) Atoms contain electrons, and they are arranged, based on different rules, in various available orbitals. The electron configuration of an element with an atomic number greater than 18 cannot be properly determined according to the Bohr atomic model. Then the next two electrons will enter the 2s orbital just like the 1s orbital. Jayden Arevalo 2K wrote: The number of orbitals depends on the subshell. Ans. Why are orbitals described as probability maps? . He has a good conceptual knowledge on different educational topics and he provides the same on this website. So its p subshell will be fully paired. 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. 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.

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