Science, Tech, Math › Science Electron Configuration Chart Electron Configurations of Atoms of Elements Share Flipboard Email Print Adrignola/Wikimedia Commons/CC 3.0 Science Chemistry Periodic Table Basics Chemical Laws Molecules Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Anne Marie Helmenstine, Ph.D. Facebook Twitter Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Learn about our Editorial Process Updated on February 01, 2021 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 Configuration To 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. Cite this Article 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 June 6, 2023). copy citation Featured Video By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Cookies Settings Accept All Cookies