Electron Configuration Chart |
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The electron configuration of an atom of any element is the of electrons per sublevel of the energy levels of an atom in its ground state. This handy chart compiles the electron configurations of the elements up through number 104. Key Takeaways: Electron Configurations An atom's electron configuration describes the way its electrons fill sublevels when the atom is in its ground state.Atoms seek the most stable electron configuration, so sublevels are half-filled or fully-filled whenever possible.Rather than writing out the whole electron configuration, scientists use a shorthand notation that starts with the symbol for the noble gas before the element on the periodic table. How to Determine Electron ConfigurationTo arrive at the electron configurations of atoms, you must know the order in which the different sublevels are filled. Electrons enter available sublevels in order of their increasing energy. A sublevel is filled or half-filled before the next sublevel is entered. For example, the s sublevel can only hold two electrons, so the 1s is filled at helium (1s2). The p sublevel can hold six electrons, the d sublevel can hold 10 electrons, and the f sublevel can hold 14 electrons. The common shorthand notation is to refer to the noble gas core, rather than write out the entire configuration. For example, the configuration of magnesium could be written [Ne]3s2, rather than writing out 1s22s22p63s2. Electron Configuration Chart No. Element K L M N O P Q 1 2 3 4 5 6 7 s s p s p d s p d f s p d f s p d f s 1 H 1 2 He 2 3 Li 2 1 4 Be 2 2 5 B 2 2 1 6 C 2 2 2 7 N 2 2 3 8 O 2 2 4 9 F 2 2 5 10 Ne 2 2 6 11 Na 2 2 6 1 12 Mg 2 2 6 2 13 Al 2 2 6 2 1 14 Si 2 2 6 2 2 15 P 2 2 6 2 3 16 S 2 2 6 2 4 17 Cl 2 2 6 2 5 18 Ar 2 2 6 2 6 19 K 2 2 6 2 6 - 1 20 Ca 2 2 6 2 6 - 2 21 Sc 2 2 6 2 6 1 2 22 Ti 2 2 6 2 6 2 2 23 V 2 2 6 2 6 3 2 24 Cr 2 2 6 2 6 5* 1 25 Mn 2 2 6 2 6 5 2 26 Fe 2 2 6 2 6 6 2 27 Co 2 2 6 2 6 7 2 28 Ni 2 2 6 2 6 8 2 29 Cu 2 2 6 2 6 10 1* 30 Zn 2 2 6 2 6 10 2 31 Ga 2 2 6 2 6 10 2 1 32 Ge 2 2 6 2 6 10 2 2 33 As 2 2 6 2 6 10 2 3 34 Se 2 2 6 2 6 10 2 4 35 Br 2 2 6 2 6 10 2 5 36 Kr 2 2 6 2 6 10 2 6 37 Rb 2 2 6 2 6 10 2 6 - 1 38 Sr 2 2 6 2 6 10 2 6 - 2 39 Y 2 2 6 2 6 10 2 6 1 2 40 Zr 2 2 6 2 6 10 2 6 2 2 41 Nb 2 2 6 2 6 10 2 6 4* 1 42 Mo 2 2 6 2 6 10 2 6 5 1 43 Tc 2 2 6 2 6 10 2 6 6 1 44 Ru 2 2 6 2 6 10 2 6 7 1 45 Rh 2 2 6 2 6 10 2 6 8 1 46 Pd 2 2 6 2 6 10 2 6 10 0* 47 Ag 2 2 6 2 6 10 2 6 10 1 48 Cd 2 2 6 2 6 10 2 6 10 2 49 In 2 2 6 2 6 10 2 6 10 2 1 50 Sn 2 2 6 2 6 10 2 6 10 2 2 51 Sb 2 2 6 2 6 10 2 6 10 2 3 52 Te 2 2 6 2 6 10 2 6 10 2 4 53 I 2 2 6 2 6 10 2 6 10 2 5 54 Xe 2 2 6 2 6 10 2 6 10 2 6 55 Cs 2 2 6 2 6 10 2 6 10 2 6 - - 1 56 Ba 2 2 6 2 6 10 2 6 10 2 6 - - 2 57 La 2 2 6 2 6 10 2 6 10 - 2 6 1 - 2 58 Ce 2 2 6 2 6 10 2 6 10 2* 2 6 - - 2 59 Pr 2 2 6 2 6 10 2 6 10 3 2 6 - - 2 60 Nd 2 2 6 2 6 10 2 6 10 4 2 6 - - 2 61 Pm 2 2 6 2 6 10 2 6 10 5 2 6 - - 2 62 Sm 2 2 6 2 6 10 2 6 10 6 2 6 - - 2 63 Eu 2 2 6 2 6 10 2 6 10 7 2 6 - - 2 64 Gd 2 2 6 2 6 10 2 6 10 7 2 6 1 - 2 65 Tb 2 2 6 2 6 10 2 6 10 9* 2 6 - - 2 66 Dy 2 2 6 2 6 10 2 6 10 10 2 6 - - 2 67 Ho 2 2 6 2 6 10 2 6 10 11 2 6 - - 2 68 Er 2 2 6 2 6 10 2 6 10 12 2 6 - - 2 69 Tm 2 2 6 2 6 10 2 6 10 13 2 6 - - 2 70 Yb 2 2 6 2 6 10 2 6 10 14 2 6 - - 2 71 Lu 2 2 6 2 6 10 2 6 10 14 2 6 1 - 2 72 Hf 2 2 6 2 6 10 2 6 10 14 2 6 2 - 2 73 Ta 2 2 6 2 6 10 2 6 10 14 2 6 3 - 2 74 W 2 2 6 2 6 10 2 6 10 14 2 6 4 - 2 75 Re 2 2 6 2 6 10 2 6 10 14 2 6 5 - 2 76 Os 2 2 6 2 6 10 2 6 10 14 2 6 6 - 2 77 Ir 2 2 6 2 6 10 2 6 10 14 2 6 7 - 2 78 Pt 2 2 6 2 6 10 2 6 10 14 2 6 9 - 1 79 Au 2 2 6 2 6 10 2 6 10 14 2 6 10 - 1 80 Hg 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 81 Tl 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 1 - - 82 Pb 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 2 - - 83 Bi 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 3 - - 84 Po 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 4 - - 85 At 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 5 - - 86 Rn 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 6 - - 87 Fr 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 6 - - 1 88 Ra 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 6 - - 2 89 Ac 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 6 1 - 2 90 Th 2 2 6 2 6 10 2 6 10 14 2 6 10 - 2 6 2 - 2 91 Pa 2 2 6 2 6 10 2 6 10 14 2 6 10 2* 2 6 1 - 2 92 U 2 2 6 2 6 10 2 6 10 14 2 6 10 3 2 6 1 - 2 93 Np 2 2 6 2 6 10 2 6 10 14 2 6 10 4 2 6 1 - 2 94 Pu 2 2 6 2 6 10 2 6 10 14 2 6 10 6 2 6 - - 2 95 Am 2 2 6 2 6 10 2 6 10 14 2 6 10 7 2 6 - - 2 96 Cm 2 2 6 2 6 10 2 6 10 14 2 6 10 7 2 6 1 - 2 97 Bk 2 2 6 2 6 10 2 6 10 14 2 6 10 9* 2 6 - - 2 98 Cf 2 2 6 2 6 10 2 6 10 14 2 6 10 10 2 6 - - 2 99 Es 2 2 6 2 6 10 2 6 10 14 2 6 10 11 2 6 - - 2 100 Fm 2 2 6 2 6 10 2 6 10 14 2 6 10 12 2 6 - - 2 101 Md 2 2 6 2 6 10 2 6 10 14 2 6 10 13 2 6 - - 2 102 No 2 2 6 2 6 10 2 6 10 14 2 6 10 14 2 6 - - 2 103 Lr 2 2 6 2 6 10 2 6 10 14 2 6 10 14 2 6 1 - 2 104 Rf 2 2 6 2 6 10 2 6 10 14 2 6 10 14 2 6 2 - 2* note the irregularity You may also view the electron configurations of the elements on a printable periodic table if desired. Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Electron Configuration Chart." ThoughtCo, Feb. 16, 2021, thoughtco.com/electron-configuration-chart-603975. Helmenstine, Anne Marie, Ph.D. (2021, February 16). Electron Configuration Chart. Retrieved from https://www.thoughtco.com/electron-configuration-chart-603975 Helmenstine, Anne Marie, Ph.D. "Electron Configuration Chart." ThoughtCo. https://www.thoughtco.com/electron-configuration-chart-603975 (accessed May 20, 2023). |
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