Aufbau Principle Electron Configuration of All Elements
The position of these electrons in different orbitals of the atom according to certain rules is called electron configuration. According to the Aufbau Principle, electrons first fill the lowest energy levels before moving on to higher ones.
This process is analogous to building a structure from the ground up, with each energy level representing a new floor. Additionally, within each energy level, electrons are distributed among different sublevels, characterized by different orbital shapes and orientations.
List of electron configuration of all elements following the Aufbau Principle
You can view the complete electron configuration by clicking on the element name.
Atomic Number | Element Name | Electron Configuration |
1 | Hydrogen | 1s1 |
2 | Helium | 1s2 |
3 | Lithium | [He] 2s1 |
4 | Beryllium | [He] 2s2 |
5 | Boron | [He]2s22p1 |
6 | Carbon | [He] 2s2 2p2 |
7 | Nitrogen | [He] 2s2 2p3 |
8 | Oxygen | [He] 2s2 2p4 |
9 | Fluorine | [He] 2s2 2p5 |
10 | Neon | [He] 2s2 2p6 |
11 | Sodium | [Ne] 3s1 |
12 | Magnesium | [Ne] 3s2 |
13 | Aluminum | [Ne]3s23p1 |
14 | Silicon | [Ne] 3s2 3p2 |
15 | Phosphorus | [Ne]3s23p3 |
16 | Sulfur | [Ne]3s23p4 |
17 | Chlorine | [Ne]3s23p5 |
18 | Argon | [Ne]3s23p6 |
19 | Potassium | [Ar]4s1 |
20 | Calcium | [Ar]4s2 |
21 | Scandium | [Ar]3d14s2 |
22 | Titanium | [Ar]3d24s2 |
23 | Vanadium | [Ar]3d34s2 |
24 | Chromium | [Ar]3d54s1 |
25 | Manganese | [Ar]3d54s2 |
26 | Iron | [Ar]3d64s2 |
27 | Cobalt | [Ar]3d74s2 |
28 | Nickel | [Ar]3d84s2 |
29 | Copper | [Ar]3d104s1 |
30 | Zinc | [Ar]3d104s2 |
31 | Gallium | [Ar]3d104s24p1 |
32 | Germanium | [Ar]3d104s24p2 |
33 | Arsenic | [Ar]3d104s24p3 |
34 | Selenium | [Ar]3d104s24p4 |
35 | Bromine | [Ar]3d104s24p5 |
36 | Krypton | [Ar]3d104s24p6 |
37 | Rubidium | [Kr]5s1 |
38 | Strontium | [Kr]5s2 |
39 | Yttrium | [Kr]4d15s2 |
40 | Zirconium | [Kr]4d25s2 |
41 | Niobium | [Kr]4d45s1 |
42 | Molybdenum | [Kr]4d55s1 |
43 | Technetium | [Kr]4d55s2 |
44 | Ruthenium | [Kr]4d75s1 |
45 | Rhodium | [Kr]4d85s1 |
46 | Palladium | [Kr]4d10 |
47 | Silver | [Kr]4d105s1 |
48 | Cadmium | [Kr]4d105s2 |
49 | Indium | [Kr]4d105s25p1 |
50 | Tin | [Kr]4d105s25p2 |
51 | Antimony | [Kr]4d105s25p3 |
52 | Tellurium | [Kr]4d105s25p4 |
53 | Iodine | [Kr]4d105s25p5 |
54 | Xenon | [Kr]4d105s25p6 |
55 | Cesium | [Xe]6s1 |
56 | Barium | [Xe]6s2 |
57 | Lanthanum | [Xe]5d16s2 |
58 | Cerium | [Xe]4f15d16s2 |
59 | Praseodymium | [Xe]4f36s2 |
60 | Neodymium | [Xe]4f46s2 |
61 | Promethium | [Xe]4f56s2 |
62 | Samarium | [Xe]4f66s2 |
63 | Europium | [Xe]4f76s2 |
64 | Gadolinium | [Xe]4f75d16s2 |
65 | Terbium | [Xe]4f96s2 |
66 | Dysprosium | [Xe]4f106s2 |
67 | Holmium | [Xe]4f116s2 |
68 | Erbium | [Xe]4f126s2 |
69 | Thulium | [Xe]4f136s2 |
70 | Ytterbium | [Xe]4f146s2 |
71 | Lutetium | [Xe]4f145d16s2 |
72 | Hafnium | [Xe]4f145d26s2 |
73 | Tantalum | [Xe]4f145d36s2 |
74 | Tungsten | [Xe]4f145d46s2 |
75 | Rhenium | [Xe]4f145d56s2 |
76 | Osmium | [Xe]4f145d66s2 |
77 | Iridium | [Xe]4f145d76s2 |
78 | Platinum | [Xe]4f145d96s1 |
79 | Gold | [Xe]4f145d106s1 |
80 | Mercury | [Xe]4f145d106s2 |
81 | Thallium | [Xe]4f145d106s26p1 |
82 | Lead | [Xe]4f145d106s26p2 |
83 | Bismuth | [Xe]4f145d106s26p3 |
84 | Polonium | [Xe]4f145d106s26p4 |
85 | Astatine | [Xe]4f145d106s26p5 |
86 | Radon | [Xe]4f145d106s26p6 |
87 | Francium | [Rn]7s1 |
88 | Radium | [Rn]7s2 |
89 | Actinium | [Rn]6d17s2 |
90 | Thorium | [Rn]6d27s2 |
91 | Protactinium | [Rn]5f26d17s2 |
92 | Uranium | [Rn]5f36d17s2 |
93 | Neptunium | [Rn]5f46d17s2 |
94 | Plutonium | [Rn]5f67s2 |
95 | Americium | [Rn]5f77s2 |
96 | Curium | [Rn]5f76d17s2 |
97 | Berkelium | [Rn]5f97s2 |
98 | Californium | [Rn]5f107s2 |
99 | Einsteinium | [Rn]5f117s2 |
100 | Fermium | [Rn]5f127s2 |
101 | Mendelevium | [Rn]5f137s2 |
102 | Nobelium | [Rn]5f147s2 |
103 | Lawrencium | [Rn]5f147s27p1 |
104 | Rutherfordium | [Rn] 5f14 6d2 7s2 |
105 | Dubnium | [Rn] 5f14 6d3 7s2 |
106 | Seaborgium | [Rn] 5f14 6d4 7s2 |
107 | Bohrium | [Rn] 5f14 6d5 7s2 |
108 | Hassium | [Rn] 5f14 6d6 7s2 |
109 | Meitnerium | *[Rn]5f146d77s2 (predicted) |
110 | Darmstadtium | *[Rn] 5f14 6d9 7s1 (predicted) |
111 | Roentgenium | *[Rn] 5f14 6d10 7s1 (predicted) |
112 | Copernium | *[Rn] 5f14 6d10 7s2 (predicted) |
113 | Nihonium | *[Rn] 5f14 6d10 7s2 7p1 (predicted) |
114 | Flerovium | *[Rn] 5f14 6d10 7s2 7p2 (predicted) |
115 | Moscovium | *[Rn] 5f14 6d10 7s2 7p3 (predicted) |
116 | Livermorium | *[Rn] 5f14 6d10 7s2 7p4 (predicted) |
117 | Tennessine | *[Rn] 5f14 6d10 7s2 7p5 (predicted) |
118 | Oganesson | *[Rn] 5f14 6d10 7s2 7p6 (predicted) |