Electron configurations of the elements (data page)

Electron configuration

Electron configurations of the neutral gaseous atoms in the ground state. Given by subshells in concise form, by subshells written out, and by number of electrons per shell. Electron configurations of elements beyond nobelium (element 102) are tentative and those beyond rutherfordium (element 104) are predicted.

As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. However there are numerous exceptions; for example the lightest exception is chromium, which would be predicted to have the configuration 1s²2s²2p⁶3s²3p⁶3d⁴4s², written as [Ar]3d⁴4s², but whose actual configuration given in the table below is [Ar]3d⁵4s¹.

Legend
1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	5g	6s	6p	6d	6f	7s	7p	7d	8s	8p	9s	9p
1 H hydrogen : 1s¹
1s¹
1
2 He helium : 1s²
1s²
2
3 Li lithium : [He] 2s¹
1s²	2s¹
2	1
4 Be beryllium : [He] 2s²
1s²	2s²
2	2
5 B boron : [He] 2s² 2p¹
1s²	2s²	2p¹
2	3
6 C carbon : [He] 2s² 2p²
1s²	2s²	2p²
2	4
7 N nitrogen : [He] 2s² 2p³
1s²	2s²	2p³
2	5
8 O oxygen : [He] 2s² 2p⁴
1s²	2s²	2p⁴
2	6
9 F fluorine : [He] 2s² 2p⁵
1s²	2s²	2p⁵
2	7
10 Ne neon : [He] 2s² 2p⁶
1s²	2s²	2p⁶
2	8
11 Na sodium : [Ne] 3s¹
1s²	2s²	2p⁶	3s¹
2	8		1
12 Mg magnesium : [Ne] 3s²
1s²	2s²	2p⁶	3s²
2	8		2
13 Al aluminium : [Ne] 3s² 3p¹
1s²	2s²	2p⁶	3s²	3p¹
2	8		3
14 Si silicon : [Ne] 3s² 3p²
1s²	2s²	2p⁶	3s²	3p²
2	8		4
15 P phosphorus : [Ne] 3s² 3p³
1s²	2s²	2p⁶	3s²	3p³
2	8		5
16 S sulfur : [Ne] 3s² 3p⁴
1s²	2s²	2p⁶	3s²	3p⁴
2	8		6
17 Cl chlorine : [Ne] 3s² 3p⁵
1s²	2s²	2p⁶	3s²	3p⁵
2	8		7
18 Ar argon : [Ne] 3s² 3p⁶
1s²	2s²	2p⁶	3s²	3p⁶
2	8		8
19 K potassium : [Ar] 4s¹
1s²	2s²	2p⁶	3s²	3p⁶		4s¹
2	8		8			1
20 Ca calcium : [Ar] 4s²
1s²	2s²	2p⁶	3s²	3p⁶		4s²
2	8		8			2
21 Sc scandium : [Ar] 3d¹ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹	4s²
2	8		9			2
22 Ti titanium : [Ar] 3d² 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d²	4s²
2	8		10			2
23 V vanadium : [Ar] 3d³ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d³	4s²
2	8		11			2
24 Cr chromium : [Ar] 3d⁵ 4s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d⁵	4s¹
2	8		13			1
25 Mn manganese : [Ar] 3d⁵ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁵	4s²
2	8		13			2
26 Fe iron : [Ar] 3d⁶ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁶	4s²
2	8		14			2
27 Co cobalt : [Ar] 3d⁷ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁷	4s²
2	8		15			2
28 Ni nickel : [Ar] 3d⁸ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁸	4s²
2	8		16			2
29 Cu copper : [Ar] 3d¹⁰ 4s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s¹
2	8		18			1
30 Zn zinc : [Ar] 3d¹⁰ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²
2	8		18			2
31 Ga gallium : [Ar] 3d¹⁰ 4s² 4p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p¹
2	8		18			3
32 Ge germanium : [Ar] 3d¹⁰ 4s² 4p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p²
2	8		18			4
33 As arsenic : [Ar] 3d¹⁰ 4s² 4p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p³
2	8		18			5
34 Se selenium : [Ar] 3d¹⁰ 4s² 4p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁴
2	8		18			6
35 Br bromine : [Ar] 3d¹⁰ 4s² 4p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁵
2	8		18			7
36 Kr krypton : [Ar] 3d¹⁰ 4s² 4p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶
2	8		18			8
37 Rb rubidium : [Kr] 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶			5s¹
2	8		18			8				1
38 Sr strontium : [Kr] 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶			5s²
2	8		18			8				2
39 Y yttrium : [Kr] 4d¹ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹		5s²
2	8		18			9				2
40 Zr zirconium : [Kr] 4d² 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d²		5s²
2	8		18			10				2
41 Nb niobium : [Kr] 4d⁴ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁴		5s¹
2	8		18			12				1
42 Mo molybdenum : [Kr] 4d⁵ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁵		5s¹
2	8		18			13				1
43 Tc technetium : [Kr] 4d⁵ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁵		5s²
2	8		18			13				2
44 Ru ruthenium : [Kr] 4d⁷ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁷		5s¹
2	8		18			15				1
45 Rh rhodium : [Kr] 4d⁸ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁸		5s¹
2	8		18			16				1
46 Pd palladium : [Kr] 4d¹⁰
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰
2	8		18			18
47 Ag silver : [Kr] 4d¹⁰ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s¹
2	8		18			18				1
48 Cd cadmium : [Kr] 4d¹⁰ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²
2	8		18			18				2
49 In indium : [Kr] 4d¹⁰ 5s² 5p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p¹
2	8		18			18				3
50 Sn tin : [Kr] 4d¹⁰ 5s² 5p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p²
2	8		18			18				4
51 Sb antimony : [Kr] 4d¹⁰ 5s² 5p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p³
2	8		18			18				5
52 Te tellurium : [Kr] 4d¹⁰ 5s² 5p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁴
2	8		18			18				6
53 I iodine : [Kr] 4d¹⁰ 5s² 5p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁵
2	8		18			18				7
54 Xe xenon : [Kr] 4d¹⁰ 5s² 5p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶
2	8		18			18				8
55 Cs caesium : [Xe] 6s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶				6s¹
2	8		18			18				8					1
56 Ba barium : [Xe] 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶				6s²
2	8		18			18				8					2
57 La lanthanum : [Xe] 5d¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶	5d¹			6s²
2	8		18			18				9					2
58 Ce cerium : [Xe] 4f¹ 5d¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹	5s²	5p⁶	5d¹			6s²
2	8		18			19				9					2
59 Pr praseodymium : [Xe] 4f³ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f³	5s²	5p⁶				6s²
2	8		18			21				8					2
60 Nd neodymium : [Xe] 4f⁴ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁴	5s²	5p⁶				6s²
2	8		18			22				8					2
61 Pm promethium : [Xe] 4f⁵ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁵	5s²	5p⁶				6s²
2	8		18			23				8					2
62 Sm samarium : [Xe] 4f⁶ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁶	5s²	5p⁶				6s²
2	8		18			24				8					2
63 Eu europium : [Xe] 4f⁷ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁷	5s²	5p⁶				6s²
2	8		18			25				8					2
64 Gd gadolinium : [Xe] 4f⁷ 5d¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁷	5s²	5p⁶	5d¹			6s²
2	8		18			25				9					2
65 Tb terbium : [Xe] 4f⁹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁹	5s²	5p⁶				6s²
2	8		18			27				8					2
66 Dy dysprosium : [Xe] 4f¹⁰ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁰	5s²	5p⁶				6s²
2	8		18			28				8					2
67 Ho holmium : [Xe] 4f¹¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹¹	5s²	5p⁶				6s²
2	8		18			29				8					2
68 Er erbium : [Xe] 4f¹² 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹²	5s²	5p⁶				6s²
2	8		18			30				8					2
69 Tm thulium : [Xe] 4f¹³ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹³	5s²	5p⁶				6s²
2	8		18			31				8					2
70 Yb ytterbium : [Xe] 4f¹⁴ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶				6s²
2	8		18			32				8					2
71 Lu lutetium : [Xe] 4f¹⁴ 5d¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹			6s²
2	8		18			32				9					2
72 Hf hafnium : [Xe] 4f¹⁴ 5d² 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d²			6s²
2	8		18			32				10					2
73 Ta tantalum : [Xe] 4f¹⁴ 5d³ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d³			6s²
2	8		18			32				11					2
74 W tungsten : [Xe] 4f¹⁴ 5d⁴ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d⁴			6s²
2	8		18			32				12					2
75 Re rhenium : [Xe] 4f¹⁴ 5d⁵ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d⁵			6s²
2	8		18			32				13					2
76 Os osmium : [Xe] 4f¹⁴ 5d⁶ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d⁶			6s²
2	8		18			32				14					2
77 Ir iridium : [Xe] 4f¹⁴ 5d⁷ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d⁷			6s²
2	8		18			32				15					2
78 Pt platinum : [Xe] 4f¹⁴ 5d⁹ 6s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d⁹			6s¹
2	8		18			32				17					1
79 Au gold : [Xe] 4f¹⁴ 5d¹⁰ 6s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s¹
2	8		18			32				18					1
80 Hg mercury : [Xe] 4f¹⁴ 5d¹⁰ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²
2	8		18			32				18					2
81 Tl thallium : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p¹
2	8		18			32				18					3
82 Pb lead : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p²
2	8		18			32				18					4
83 Bi bismuth : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p³
2	8		18			32				18					5
84 Po polonium : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁴
2	8		18			32				18					6
85 At astatine : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁵
2	8		18			32				18					7
86 Rn radon : [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁶
2	8		18			32				18					8
87 Fr francium : [Rn] 7s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁶			7s¹
2	8		18			32				18					8				1
88 Ra radium : [Rn] 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁶			7s²
2	8		18			32				18					8				2
89 Ac actinium : [Rn] 6d¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁶	6d¹		7s²
2	8		18			32				18					9				2
90 Th thorium : [Rn] 6d² 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰			6s²	6p⁶	6d²		7s²
2	8		18			32				18					10				2
91 Pa protactinium : [Rn] 5f² 6d¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f²		6s²	6p⁶	6d¹		7s²
2	8		18			32				20					9				2
92 U uranium : [Rn] 5f³ 6d¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f³		6s²	6p⁶	6d¹		7s²
2	8		18			32				21					9				2
93 Np neptunium : [Rn] 5f⁴ 6d¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f⁴		6s²	6p⁶	6d¹		7s²
2	8		18			32				22					9				2
94 Pu plutonium : [Rn] 5f⁶ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f⁶		6s²	6p⁶			7s²
2	8		18			32				24					8				2
95 Am americium : [Rn] 5f⁷ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f⁷		6s²	6p⁶			7s²
2	8		18			32				25					8				2
96 Cm curium : [Rn] 5f⁷ 6d¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f⁷		6s²	6p⁶	6d¹		7s²
2	8		18			32				25					9				2
97 Bk berkelium : [Rn] 5f⁹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f⁹		6s²	6p⁶			7s²
2	8		18			32				27					8				2
98 Cf californium : [Rn] 5f¹⁰ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁰		6s²	6p⁶			7s²
2	8		18			32				28					8				2
99 Es einsteinium : [Rn] 5f¹¹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹¹		6s²	6p⁶			7s²
2	8		18			32				29					8				2
100 Fm fermium : [Rn] 5f¹² 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹²		6s²	6p⁶			7s²
2	8		18			32				30					8				2
101 Md mendelevium : [Rn] 5f¹³ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹³		6s²	6p⁶			7s²
2	8		18			32				31					8				2
102 No nobelium : [Rn] 5f¹⁴ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶			7s²
2	8		18			32				32					8				2
103 Lr lawrencium : [Rn] 5f¹⁴ 7s² 7p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶			7s²	7p¹
2	8		18			32				32					8				3
104 Rf rutherfordium : [Rn] 5f¹⁴ 6d² 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d²		7s²
2	8		18			32				32					10				2
105 Db dubnium : [Rn] 5f¹⁴ 6d³ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d³		7s²
2	8		18			32				32					11				2
106 Sg seaborgium : [Rn] 5f¹⁴ 6d⁴ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁴		7s²
2	8		18			32				32					12				2
107 Bh bohrium : [Rn] 5f¹⁴ 6d⁵ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁵		7s²
2	8		18			32				32					13				2
108 Hs hassium : [Rn] 5f¹⁴ 6d⁶ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁶		7s²
2	8		18			32				32					14				2
109 Mt meitnerium : [Rn] 5f¹⁴ 6d⁷ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁷		7s²
2	8		18			32				32					15				2
110 Ds darmstadtium : [Rn] 5f¹⁴ 6d⁸ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁸		7s²
2	8		18			32				32					16				2
111 Rg roentgenium : [Rn] 5f¹⁴ 6d⁹ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d⁹		7s²
2	8		18			32				32					17				2
112 Cn copernicium : [Rn] 5f¹⁴ 6d¹⁰ 7s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²
2	8		18			32				32					18				2
113 Uut ununtrium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p¹
2	8		18			32				32					18				3
114 Fl flerovium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p²
2	8		18			32				32					18				4
115 Uup ununpentium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p³
2	8		18			32				32					18				5
116 Lv livermorium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁴
2	8		18			32				32					18				6
117 Uus ununseptium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁵
2	8		18			32				32					18				7
118 Uuo ununoctium : [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁶
2	8		18			32				32					18				8
119 Uue ununennium : [Uuo] 8s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁶		8s¹
2	8		18			32				32					18				8			1
120 Ubn unbinilium : [Uuo] 8s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁶		8s²
2	8		18			32				32					18				8			2
121 Ubu unbiunium : [Uuo] 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁶		8s²	8p¹
2	8		18			32				32					18				8			3
122 Ubb unbibium : [Uuo] 7d¹ 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰		7s²	7p⁶	7d¹	8s²	8p¹
2	8		18			32				32					18				9			3
123 Ubt unbitrium : [Uuo] 6f¹ 7d¹ 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰	6f¹	7s²	7p⁶	7d¹	8s²	8p¹
2	8		18			32				32					19				9			3
124 Ubq unbiquadium : [Uuo] 6f³ 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴		6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶		8s²	8p¹
2	8		18			32				32					21				8			3
125 Ubp unbipentium : [Uuo] 5g¹ 6f³ 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶		8s²	8p¹
2	8		18			32				33					21				8			3
126 Ubh unbihexium : [Uuo] 5g² 6f² 7d¹ 8s² 8p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g²	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶	7d¹	8s²	8p¹
2	8		18			32				34					20				9			3
127 Ubs unbiseptium : [Uuo] 5g³ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g³	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				35					20				8			4
128 Ubo unbioctium : [Uuo] 5g⁴ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁴	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				36					20				8			4
129 Ube unbiennium : [Uuo] 5g⁵ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁵	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				37					20				8			4
130 Utn untrinilium : [Uuo] 5g⁶ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁶	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				38					20				8			4
131 Utu untriunium : [Uuo] 5g⁷ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁷	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				39					20				8			4
132 Utb untribium : [Uuo] 5g⁸ 6f² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁸	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶		8s²	8p²
2	8		18			32				40					20				8			4
133 Utt untritrium : [Uuo] 5g⁸ 6f³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁸	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶		8s²	8p²
2	8		18			32				40					21				8			4
134 Utq untriquadium : [Uuo] 5g⁸ 6f⁴ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁸	6s²	6p⁶	6d¹⁰	6f⁴	7s²	7p⁶		8s²	8p²
2	8		18			32				40					22				8			4
135 Utp untripentium : [Uuo] 5g⁹ 6f⁴ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g⁹	6s²	6p⁶	6d¹⁰	6f⁴	7s²	7p⁶		8s²	8p²
2	8		18			32				41					22				8			4
136 Uth untrihexium : [Uuo] 5g¹⁰ 6f⁴ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁰	6s²	6p⁶	6d¹⁰	6f⁴	7s²	7p⁶		8s²	8p²
2	8		18			32				42					22				8			4
137 Uts untriseptium : [Uuo] 5g¹¹ 6f³ 7d¹ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹¹	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶	7d¹	8s²	8p²
2	8		18			32				43					21				9			4
138 Uto untrioctium : [Uuo] 5g¹² 6f³ 7d¹ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹²	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶	7d¹	8s²	8p²
2	8		18			32				44					21				9			4
139 Ute untriennium : [Uuo] 5g¹³ 6f² 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹³	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				45					20				10			4
140 Uqn unquadnilium : [Uuo] 5g¹⁴ 6f³ 7d¹ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁴	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶	7d¹	8s²	8p²
2	8		18			32				46					21				9			4
141 Uqu unquadunium : [Uuo] 5g¹⁵ 6f² 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁵	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				47					20				10			4
142 Uqb unquadbium : [Uuo] 5g¹⁶ 6f² 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁶	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				48					20				10			4
143 Uqt unquadtrium : [Uuo] 5g¹⁷ 6f² 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁷	6s²	6p⁶	6d¹⁰	6f²	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				49					20				10			4
144 Uqq unquadquadium : [Uuo] 5g¹⁸ 6f¹ 7d³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹	7s²	7p⁶	7d³	8s²	8p²
2	8		18			32				50					19				11			4
145 Uqp unquadpentium : [Uuo] 5g¹⁸ 6f³ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f³	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					21				10			4
146 Uqh unquadhexium : [Uuo] 5g¹⁸ 6f⁴ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁴	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					22				10			4
147 Uqs unquadseptium : [Uuo] 5g¹⁸ 6f⁵ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁵	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					23				10			4
148 Uqo unquadoctium : [Uuo] 5g¹⁸ 6f⁶ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁶	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					24				10			4
149 Uqe unquadennium : [Uuo] 5g¹⁸ 6f⁶ 7d³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁶	7s²	7p⁶	7d³	8s²	8p²
2	8		18			32				50					24				11			4
150 Upn unpentnilium : [Uuo] 5g¹⁸ 6f⁶ 7d⁴ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁶	7s²	7p⁶	7d⁴	8s²	8p²
2	8		18			32				50					24				12			4
151 Upu unpentunium : [Uuo] 5g¹⁸ 6f⁸ 7d³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁸	7s²	7p⁶	7d³	8s²	8p²
2	8		18			32				50					26				11			4
152 Upb unpentbium : [Uuo] 5g¹⁸ 6f⁹ 7d³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f⁹	7s²	7p⁶	7d³	8s²	8p²
2	8		18			32				50					27				11			4
153 Upt unpenttrium : [Uuo] 5g¹⁸ 6f¹¹ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹¹	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					29				10			4
154 Upq unpentquadium : [Uuo] 5g¹⁸ 6f¹² 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹²	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					30				10			4
155 Upp unpentpentium : [Uuo] 5g¹⁸ 6f¹³ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹³	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					31				10			4
156 Uph unpenthexium : [Uuo] 5g¹⁸ 6f¹⁴ 7d² 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d²	8s²	8p²
2	8		18			32				50					32				10			4
157 Ups unpentseptium : [Uuo] 5g¹⁸ 6f¹⁴ 7d³ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d³	8s²	8p²
2	8		18			32				50					32				11			4
158 Upo unpentoctium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁴	8s²	8p²
2	8		18			32				50					32				12			4
159 Upe unpentennium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p² 9s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁴	8s²	8p²	9s¹
2	8		18			32				50					32				12			4		1
160 Uhn unhexnilium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁵ 8s² 8p² 9s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁵	8s²	8p²	9s¹
2	8		18			32				50					32				13			4		1
161 Uhu unhexunium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁶ 8s² 8p² 9s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁶	8s²	8p²	9s¹
2	8		18			32				50					32				14			4		1
162 Uhb unhexbium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁸ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁸	8s²	8p²
2	8		18			32				50					32				16			4
163 Uht unhextrium : [Uuo] 5g¹⁸ 6f¹⁴ 7d⁹ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d⁹	8s²	8p²
2	8		18			32				50					32				17			4
164 Uhq unhexquadium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p²
2	8		18			32				50					32				18			4
165 Uhp unhexpentium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p² 9s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p²	9s¹
2	8		18			32				50					32				18			4		1
166 Uhh unhexhexium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p² 9s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p²	9s²
2	8		18			32				50					32				18			4		2
167 Uhs unhexseptium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p² 9s² 9p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p²	9s²	9p¹
2	8		18			32				50					32				18			4		3
168 Uho unhexoctium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p² 9s² 9p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p²	9s²	9p²
2	8		18			32				50					32				18			4		4
169 Uhe unhexennium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p³ 9s² 9p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p³	9s²	9p²
2	8		18			32				50					32				18			5		4
170 Usn unseptnilium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p⁴ 9s² 9p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p⁴	9s²	9p²
2	8		18			32				50					32				18			6		4
171 Usu unseptunium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p⁵ 9s² 9p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p⁵	9s²	9p²
2	8		18			32				50					32				18			7		4
172 Usb unseptbium : [Uuo] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p⁶ 9s² 9p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶	5d¹⁰	5f¹⁴	5g¹⁸	6s²	6p⁶	6d¹⁰	6f¹⁴	7s²	7p⁶	7d¹⁰	8s²	8p⁶	9s²	9p²
2	8		18			32				50					32				18			8		4

References

All sources concur with the data above except in the separately listed instances:

NIST

http://physics.nist.gov/PhysRefData/IonEnergy/ionEnergy.html ; retrieved July 2005, (elements 1–104) based on:
- Atomic Spectroscopy, by W.C. Martin and W.L. Wiese in Atomic, Molecular, & Optical Physics Handbook, ed. by G.W.F. Drake (AIP, Woodbury, NY, 1996) Chapter 10, pp. 135–153.

This website is also cited in the CRC Handbook as source of Section 1, subsection Electron Configuration of Neutral Atoms in the Ground State.

91 Pa : [Rn] 5f²(³H₄) 6d 7s²
92 U : [Rn] 5f³(⁴I^o_9/2) 6d 7s²
93 Np : [Rn] 5f⁴(⁵I₄) 6d 7s²
103 Lr : [Rn] 5f¹⁴ 7s² 7p¹ question-marked
104 Rf : [Rn] 5f¹⁴ 6d² 7s² question-marked

CRC

David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition, online version. CRC Press. Boca Raton, Florida, 2003; Section 1, Basic Constants, Units, and Conversion Factors; Electron Configuration of Neutral Atoms in the Ground State. (elements 1–104)
Also subsection Periodic Table of the Elements, (elements 1–103) based on:
- G. J. Leigh, Editor, Nomenclature of Inorganic Chemistry, Blackwell Scientific Publications, Oxford, 1990.
- Chemical and Engineering News, 63(5), 27, 1985.
- Atomic Weights of the Elements, 1999, Pure & Appl. Chem., 73, 667, 2001.

WebElements

http://www.webelements.com/ ; retrieved July 2005, electron configurations based on:
- Atomic, Molecular, & Optical Physics Handbook, Ed. Gordon W. F. Drake, American Institute of Physics, Woodbury, New York, USA, 1996.
- J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
- R.L. DeKock and H.B. Gray in Chemical Structure and bonding, Benjamin/Cummings, Menlo Park, California, USA, 1980.
- A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.

103 Lr : [Rn].5f¹⁴.7s².7p¹ tentative ; 2.8.18.32.32.9.2 [inconsistent]
104 Rf : [Rn].5f¹⁴.6d².7s² tentative
105 Db : [Rn].5f¹⁴.6d³.7s² (a guess based upon that of tantalum) ; 2.8.18.32.32.11.2
106 Sg : [Rn].5f¹⁴.6d⁴.7s² (a guess based upon that of tungsten) ; 2.8.18.32.32.12.2
107 Bh : [Rn].5f¹⁴.6d⁵.7s² (a guess based upon that of rhenium) ; 2.8.18.32.32.13.2
108 Hs : [Rn].5f¹⁴.6d⁶.7s² (a guess based upon that of osmium) ; 2.8.18.32.32.14.2
109 Mt : [Rn].5f¹⁴.6d⁷.7s² (a guess based upon that of iridium) ; 2.8.18.32.32.15.2
110 Ds : [Rn].5f¹⁴.6d⁹.7s¹ (a guess based upon that of platinum) ; 2.8.18.32.32.17.1
111 Rg : [Rn].5f¹⁴.6d¹⁰.7s¹ (a guess based upon that of gold) ; 2.8.18.32.32.18.1
112 Cn : [Rn].5f¹⁴.6d¹⁰.7s² (a guess based upon that of mercury) ; 2.8.18.32.32.18.2
113 Uut : [Rn].5f¹⁴.6d¹⁰.7s².7p¹ (a guess based upon that of thallium) ; 2.8.18.32.32.18.3
114 Fl : [Rn].5f¹⁴.6d¹⁰.7s².7p² (a guess based upon that of lead) ; 2.8.18.32.32.18.4
115 Uup : [Rn].5f¹⁴.6d¹⁰.7s².7p³ (a guess based upon that of bismuth) ; 2.8.18.32.32.18.5
116 Lv : [Rn].5f¹⁴.6d¹⁰.7s².7p⁴ (a guess based upon that of polonium) ; 2.8.18.32.32.18.6
117 Uus : [Rn].5f¹⁴.6d¹⁰.7s².7p⁵ (a guess based upon that of astatine) ; 2.8.18.32.32.18.7
118 Uuo : [Rn].5f¹⁴.6d¹⁰.7s².7p⁶ (a guess based upon that of radon) ; 2.8.18.32.32.18.8

Lange

J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), online version, McGraw-Hill, 1999; Section 4, Table 4.1 Electronic Configuration and Properties of the Elements. (Elements 1–103)

97 Bk : [Rn] 5f⁸ 6d 7s²
103 Lr : [Rn] 4f¹⁴ [sic] 6d 7s²

Hill and Petrucci

Hill and Petrucci, General Chemistry: An Integrated Approach (3rd edition), Prentice Hall. (Elements 1–106)

58 Ce : [Xe] 4f² 6s²
103 Lr : [Rn] 5f¹⁴ 6d¹ 7s²
104 Rf : [Rn] 5f¹⁴ 6d² 7s² (agrees with guess above)
105 Db : [Rn] 5f¹⁴ 6d³ 7s²
106 Sg : [Rn] 5f¹⁴ 6d⁴ 7s²

Hoffman, Lee, and Pershina

Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. p. 1722. ISBN 1-4020-3555-1.

This book contains predicted electron configurations for the elements 119–172 and 184, based on relativistic Dirac–Fock calculations by B. Fricke in Fricke, B. (1975). Dunitz, J. D., ed. Structure and Bonding (Berlin: Springer-Verlag) 21: 89–144. Missing or empty |title= (help)

Electron configurations of the elements (data page)