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Electron configuration
Arrangement of electrons over atomic orbitals in the ground state of the neutral atom — both the full configuration and the shorthand form.
Data completeness Electron configuration 118 of 118Full configuration 108 of 118Data kind 10 of 118
| Symbol | Name | ||||
|---|---|---|---|---|---|
| 1 | H | Hydrogen | 1s1 | 1s | — |
| 2 | He | Helium | 1s2 | 1s2 | — |
| 3 | Li | Lithium | [He]2s1 | 1s2.2s | — |
| 4 | Be | Beryllium | [He]2s2 | 1s2.2s2 | — |
| 5 | B | Boron | [He]2s22p1 | 1s2.2s2.2p | — |
| 6 | C | Carbon | [He]2s22p2 | 1s2.2s2.2p2 | — |
| 7 | N | Nitrogen | 2s2.2p3 | 1s2.2s2.2p3 | — |
| 8 | O | Oxygen | [He]2s22p4 | 1s2.2s2.2p4 | — |
| 9 | F | Fluorine | [He]2s22p5 | 1s2.2s2.2p5 | — |
| 10 | Ne | Neon | [He]2s22p6 | 1s2.2s2.2p6 | — |
| 11 | Na | Sodium | [Ne]3s1 | 1s2.2s2.2p6.3s | — |
| 12 | Mg | Magnesium | [Ne]3s2 | 1s2.2s2.2p6.3s2 | — |
| 13 | Al | Aluminum | [Ne]3s23p1 | 1s2.2s2.2p6.3s2.3p | — |
| 14 | Si | Silicon | [Ne]3s23p2 | 1s2.2s2.2p6.3s2.3p2 | — |
| 15 | P | Phosphorus | [Ne]3s23p3 | 1s2.2s2.2p6.3s2.3p3 | — |
| 16 | S | Sulfur | [Ne]3s23p4 | 1s2.2s2.2p6.3s2.3p4 | — |
| 17 | Cl | Chlorine | [Ne]3s23p5 | 1s2.2s2.2p6.3s2.3p5 | — |
| 18 | Ar | Argon | [Ne]3s23p6 | 1s2.2s2.2p6.3s2.3p6 | — |
| 19 | K | Potassium | [Ar]4s1 | 1s2.2s2.2p6.3s2.3p6.4s | — |
| 20 | Ca | Calcium | [Ar]4s2 | 1s2.2s2.2p6.3s2.3p6.4s2 | — |
| 21 | Sc | Scandium | [Ar]4s23d1 | 1s2.2s2.2p6.3s2.3p6.3d.4s2 | — |
| 22 | Ti | Titanium | [Ar]4s23d2 | 1s2.2s2.2p6.3s2.3p6.3d2.4s2 | — |
| 23 | V | Vanadium | [Ar]4s23d3 | 1s2.2s2.2p6.3s2.3p6.3d3.4s2 | — |
| 24 | Cr | Chromium | [Ar]3d54s1 | 1s2.2s2.2p6.3s2.3p6.3d5.4s | — |
| 25 | Mn | Manganese | [Ar]4s23d5 | 1s2.2s2.2p6.3s2.3p6.3d5.4s2 | — |
| 26 | Fe | Iron | [Ar]4s23d6 | 1s2.2s2.2p6.3s2.3p6.3d6.4s2 | — |
| 27 | Co | Cobalt | [Ar]4s23d7 | 1s2.2s2.2p6.3s2.3p6.3d7.4s2 | — |
| 28 | Ni | Nickel | [Ar]4s23d8 | 1s2.2s2.2p6.3s2.3p6.3d8.4s2 | — |
| 29 | Cu | Copper | [Ar]4s13d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s | — |
| 30 | Zn | Zinc | [Ar]4s23d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2 | — |
| 31 | Ga | Gallium | [Ar]4s23d104p1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p | — |
| 32 | Ge | Germanium | [Ar]4s23d104p2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p2 | — |
| 33 | As | Arsenic | [Ar]4s23d104p3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p3 | — |
| 34 | Se | Selenium | [Ar]4s23d104p4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p4 | — |
| 35 | Br | Bromine | [Ar]4s23d104p5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p5 | — |
| 36 | Kr | Krypton | [Ar]4s23d104p6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6 | — |
| 37 | Rb | Rubidium | [Kr]5s1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.5s | — |
| 38 | Sr | Strontium | [Kr]5s2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.5s2 | — |
| 39 | Y | Yttrium | [Kr]5s24d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d.5s2 | — |
| 40 | Zr | Zirconium | [Kr]5s24d2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d2.5s2 | — |
| 41 | Nb | Niobium | [Kr]5s14d4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d4.5s | — |
| 42 | Mo | Molybdenum | [Kr]5s14d5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d5.5s | — |
| 43 | Tc | Technetium | [Kr]5s24d5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d5.5s2 | — |
| 44 | Ru | Ruthenium | [Kr]5s14d7 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d7.5s | — |
| 45 | Rh | Rhodium | [Kr]5s14d8 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d8.5s | — |
| 46 | Pd | Palladium | [Kr]4d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10 | — |
| 47 | Ag | Silver | [Kr]5s14d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s | — |
| 48 | Cd | Cadmium | [Kr]5s24d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2 | — |
| 49 | In | Indium | [Kr]5s24d105p1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p | — |
| 50 | Sn | Tin | [Kr]5s24d105p2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p2 | — |
| 51 | Sb | Antimony | [Kr]5s24d105p3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p3 | — |
| 52 | Te | Tellurium | [Kr]5s24d105p4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p4 | — |
| 53 | I | Iodine | [Kr]5s24d105p5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p5 | — |
| 54 | Xe | Xenon | [Kr]5s24d105p6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6 | — |
| 55 | Cs | Cesium | [Xe]6s1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.6s | — |
| 56 | Ba | Barium | [Xe]6s2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.6s2 | — |
| 57 | La | Lanthanum | [Xe]6s25d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.5d.6s2 | — |
| 58 | Ce | Cerium | [Xe]6s24f15d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f.5d.6s2 | — |
| 59 | Pr | Praseodymium | [Xe]6s24f3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f3.6s2 | — |
| 60 | Nd | Neodymium | [Xe]6s24f4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f4.6s2 | — |
| 61 | Pm | Promethium | [Xe]6s24f5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f5.6s2 | — |
| 62 | Sm | Samarium | [Xe]6s24f6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f6.6s2 | — |
| 63 | Eu | Europium | [Xe]6s24f7 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f7.6s2 | — |
| 64 | Gd | Gadolinium | [Xe]6s24f75d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f7.5d.6s2 | — |
| 65 | Tb | Terbium | [Xe]6s24f9 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f9.6s2 | — |
| 66 | Dy | Dysprosium | [Xe]6s24f10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f10.6s2 | — |
| 67 | Ho | Holmium | [Xe]6s24f11 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f11.6s2 | — |
| 68 | Er | Erbium | [Xe]6s24f12 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f12.6s2 | — |
| 69 | Tm | Thulium | [Xe]6s24f13 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f13.6s2 | — |
| 70 | Yb | Ytterbium | [Xe]6s24f14 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.6s2 | — |
| 71 | Lu | Lutetium | [Xe]6s24f145d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d.6s2 | — |
| 72 | Hf | Hafnium | [Xe]6s24f145d2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d2.6s2 | — |
| 73 | Ta | Tantalum | [Xe]6s24f145d3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d3.6s2 | — |
| 74 | W | Tungsten | [Xe]6s24f145d4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d4.6s2 | — |
| 75 | Re | Rhenium | [Xe]6s24f145d5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d5.6s2 | — |
| 76 | Os | Osmium | [Xe]6s24f145d6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d6.6s2 | — |
| 77 | Ir | Iridium | [Xe]6s24f145d7 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d7.6s2 | — |
| 78 | Pt | Platinum | [Xe]6s14f145d9 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d9.6s | — |
| 79 | Au | Gold | [Xe]6s14f145d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s | — |
| 80 | Hg | Mercury | [Xe]6s24f145d10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2 | — |
| 81 | Tl | Thallium | [Xe]6s24f145d106p1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p | — |
| 82 | Pb | Lead | [Xe]6s24f145d106p2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p2 | — |
| 83 | Bi | Bismuth | [Xe]6s24f145d106p3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p3 | — |
| 84 | Po | Polonium | [Xe]6s24f145d106p4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p4 | — |
| 85 | At | Astatine | [Xe]6s24f145d106p5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p5 | — |
| 86 | Rn | Radon | [Xe]6s24f145d106p6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6 | — |
| 87 | Fr | Francium | [Rn]7s1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.7s | — |
| 88 | Ra | Radium | [Rn]7s2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.7s2 | — |
| 89 | Ac | Actinium | [Rn]7s26d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.6d.7s2 | — |
| 90 | Th | Thorium | [Rn]7s26d2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.6d2.7s2 | — |
| 91 | Pa | Protactinium | [Rn]7s25f26d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f2.6d.7s2 | — |
| 92 | U | Uranium | [Rn]7s25f36d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f3.6d.7s2 | — |
| 93 | Np | Neptunium | [Rn]7s25f46d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f4.6d.7s2 | — |
| 94 | Pu | Plutonium | [Rn]7s25f6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f6.7s2 | — |
| 95 | Am | Americium | [Rn]7s25f7 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f7.7s2 | — |
| 96 | Cm | Curium | [Rn]7s25f76d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f7.6d.7s2 | — |
| 97 | Bk | Berkelium | [Rn]7s25f9 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f9.7s2 | — |
| 98 | Cf | Californium | [Rn]7s25f10 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f10.7s2 | — |
| 99 | Es | Einsteinium | [Rn]7s25f11 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f11.7s2 | — |
| 100 | Fm | Fermium | [Rn] 5f12 7s2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f12.7s2 | — |
| 101 | Md | Mendelevium | [Rn]7s25f13 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f13.7s2 | — |
| 102 | No | Nobelium | [Rn]7s25f14 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.7s2 | — |
| 103 | Lr | Lawrencium | [Rn]7s25f146d1 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.7s2.7p | — |
| 104 | Rf | Rutherfordium | [Rn]7s25f146d2 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d2.7s2 | — |
| 105 | Db | Dubnium | [Rn]7s25f146d3 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d3.7s2 | — |
| 106 | Sg | Seaborgium | [Rn]7s25f146d4 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d4.7s2 | — |
| 107 | Bh | Bohrium | [Rn]7s25f146d5 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d5.7s2 | — |
| 108 | Hs | Hassium | [Rn]7s25f146d6 | 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d6.7s2 | — |
| 109 | Mt | Meitnerium | [Rn]7s25f146d7 predicted | — | Calculated |
| 110 | Ds | Darmstadtium | [Rn]7s25f146d8 predicted | — | Predicted |
| 111 | Rg | Roentgenium | [Rn] 7s2 5f14 6d9 predicted | — | Predicted |
| 112 | Cn | Copernicium | [Rn] 7s2 5f14 6d10 predicted | — | Predicted |
| 113 | Nh | Nihonium | [Rn] 5f14 6d10 7s2 7p1 predicted | — | Predicted |
| 114 | Fl | Flerovium | [Rn] 7s27p2 5f14 6d10 predicted | — | Predicted |
| 115 | Mc | Moscovium | [Rn] 7s2 7p3 5f14 6d10 predicted | — | Predicted |
| 116 | Lv | Livermorium | [Rn] 7s2 7p4 5f14 6d10 predicted | — | Predicted |
| 117 | Ts | Tennessine | [Rn] 7s2 7p5 5f14 6d10 predicted | — | Predicted |
| 118 | Og | Oganesson | [Rn] 7s2 7p6 5f14 6d10 predicted | — | Predicted |
Sources and notes
- Configurations marked “predicted” are computed, not measured; they are shown with a separate label.