Annex: Electronic configurations

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The following periodic table indicates the electronic configuration of the chemical elements. Chemical elements that have electronic configurations other than those expected based on the orbital filling rules have been highlighted (in bold). For each element, only the electronic configuration of the last level is indicated.

Group

Period

1
1

H
1

He
2

1
1

2
2
2p

Li
1

Be
2

B
2
1

C
2
2

N
2
3

O
2
4

F
2
5

Ne
2
6

2
2
2p

3
3
3p

Na
1

Mg
2

Al
2
1

Yeah.
2
2

P
2
3

S
2
4

Cl
2
5

Ar
2
6

3
3
3p

4
4
3d
4p

K
1

Ca
2

Sc
2
1

Ti
2
2

V
2
3

Cr
1
5

Mn
2
5

Fe
2
6

Co
2
7

Ni
2
8

Cu
1
10

Zn
2
10

Ga
2
10
1

Ge
2
10
2

As
2
10
3

Separate
2
10
4

Br
2
10
5

Kr
2
10
6

4
4
3d
4p

5
5
4d
5p

Rb
1

Mr.
2

And
2
1

Zr
2
2

Nb
1
4

Mo
2
4

Tc
2
5

Ru
1
7

Rh
2
7

Pd
0
10

Ag
1
10

Cd
2
10

In
2
10
1

Sn
2
10
2

Sb
2
10
3

You
2
10
4

I
2
10
5

Xe
2
10
6

5
5
4d
5p

6
6
4f
5d
6p

Cs
1

Ba
2

♪

Lu
2
14
1

Hf
2
14
2

Ta
2
14
3

W
2
14
4

Re
2
14
5

You
2
14
6

Go
2
14
7

Pt
2
14
8

Au
2
14
9

Hg
2
14
10

Tl
2
14
10
1

Pb
2
14
10
2

Bi
2
14
10
3

Po
2
14
10
4

At
2
14
10
5

Rn
2
14
10
6

6
6
4f
5d
6p

7
7s
5f
6d
7p

Fr
1

Ra
2

Lr
2
14
1

Rf
2
14
2

Db
2
14
3

Sg
2
14
4

Bh
2
14
5

Hs
2
14
6

Mt
2
14
7

Ds
2
14
8

Rg
2
14
9

Cn
2
14
10

Nh
2
14
10
1

Fl
2
14
10
2

Mc
2
14
10
3

Lv
2
14
10
4

Ts
2
14
10
5

Og
2
14
10
6

7
7s
5f
6d
7p

♪
6
4f
5d

La
2

Ce
2
2

Pr
2
3

Nd
2
4

Pm
2
5

Sm
2
6

Eu
2
7

Gd
2
7
1

Tb
2
9

Dy
2
10

Ho
2
11

Er
2
12

Tm
2
13

Yb
2
14

**
7s
5f
6d

Ac
2

Th
2

Pa
2
2
1

U
2
3
1

Np
2
4
1

Pu
2
6

Am
2
7

Cm
2
7
1

Bk
2
9

Cf
2
10

That's it.
2
11

Fm
2
12

Md
2
13

No.
2
14

Block s

Block p

Block d

Block f

Block g?

Elements 1 to 118

The following are the electronic configurations of neutral gaseous atoms in their ground states. For each atom, the subshells are given concisely first, then with all subshells written out, followed by the number of electrons per shell. The electron configurations of elements beyond hasium (element 108) have never been measured; therefore the predictions are used.

As a rough rule of thumb, electron configurations are given by Aufbau's principle and Madelung's rule. However, there are numerous exceptions; for example, the slightest exception is chrome, which is predicted to have the configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s², written as [Ar] 3d⁴ 4s², but whose actual configuration given in the following table is [Ar] 3d⁵ 4s¹.

Note that these electron configurations are given for neutral atoms in the gas phase, which are not the same as the electron configurations for the same atoms in chemical environments. In many cases, the multiple configurations lie within a small range of energies, and the irregularities shown below do not necessarily have a clear relationship to chemical behavior. For the undiscovered eighth-row elements, mixing is expected of configurations is very important and sometimes the result can no longer be described well with a single configuration.

Leyenda
1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	7s	7p
1 H — hidrógeno — 1s¹
1s¹
1
2 He — helio — 1s²
1s²
2
3 Li — litio — [He] 2s¹
1s²	2s¹
2	1
4 Be — berilio — [He] 2s²
1s²	2s²
2	2
5 B — boro — [He] 2s² 2p¹
1s²	2s²	2p¹
2	3
6 C — carbono — [He] 2s² 2p²
1s²	2s²	2p²
2	4
7 N — nitrógeno — [He] 2s² 2p³
1s²	2s²	2p³
2	5
8 O — oxígeno — [He] 2s² 2p⁴
1s²	2s²	2p⁴
2	6
9 F — flúor — [He] 2s² 2p⁵
1s²	2s²	2p⁵
2	7
10 Ne — neón — [He] 2s² 2p⁶
1s²	2s²	2p⁶
2	8
11 Na — sodio — [Ne] 3s¹
1s²	2s²	2p⁶	3s¹
2	8		1
12 Mg — magnesio — [Ne] 3s²
1s²	2s²	2p⁶	3s²
2	8		2
13 Al — aluminio — [Ne] 3s² 3p¹
1s²	2s²	2p⁶	3s²	3p¹
2	8		3
14 Si — silicio — [Ne] 3s² 3p²
1s²	2s²	2p⁶	3s²	3p²
2	8		4
15 P — fósforo — [Ne] 3s² 3p³
1s²	2s²	2p⁶	3s²	3p³
2	8		5
16 S — azufre — [Ne] 3s² 3p⁴
1s²	2s²	2p⁶	3s²	3p⁴
2	8		6
17 Cl — cloro — [Ne] 3s² 3p⁵
1s²	2s²	2p⁶	3s²	3p⁵
2	8		7
18 Ar — argón — [Ne] 3s² 3p⁶
1s²	2s²	2p⁶	3s²	3p⁶
2	8		8
19 K — potasio — [Ar] 4s¹
1s²	2s²	2p⁶	3s²	3p⁶		4s¹
2	8		8			1
20 Ca — calcio — [Ar] 4s²
1s²	2s²	2p⁶	3s²	3p⁶		4s²
2	8		8			2
21 Sc — escandio — [Ar] 3d¹ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹	4s²
2	8		9			2
22 Ti — titanio — [Ar] 3d² 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d²	4s²
2	8		10			2
23 V — vanadio — [Ar] 3d³ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d³	4s²
2	8		11			2
24 Cr — cromo — [Ar] 3d⁵ 4s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d⁵	4s¹
2	8		13			1
25 Mn — manganeso — [Ar] 3d⁵ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁵	4s²
2	8		13			2
26 Fe — hierro — [Ar] 3d⁶ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁶	4s²
2	8		14			2
27 Co — cobalto — [Ar] 3d⁷ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁷	4s²
2	8		15			2
28 Ni — níquel — [Ar] 3d⁸ 4s²
1s²	2s²	2p⁶	3s²	3p⁶	3d⁸	4s²
2	8		16			2
29 Cu — cobre — [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 — galio — [Ar] 3d¹⁰ 4s² 4p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p¹
2	8		18			3
32 Ge — germanio — [Ar] 3d¹⁰ 4s² 4p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p²
2	8		18			4
33 As — arsénico — [Ar] 3d¹⁰ 4s² 4p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p³
2	8		18			5
34 Se — selenio — [Ar] 3d¹⁰ 4s² 4p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁴
2	8		18			6
35 Br — bromo — [Ar] 3d¹⁰ 4s² 4p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁵
2	8		18			7
36 Kr — kriptón — [Ar] 3d¹⁰ 4s² 4p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶
2	8		18			8
37 Rb — rubidio — [Kr] 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶			5s¹
2	8		18			8				1
38 Sr — estroncio — [Kr] 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶			5s²
2	8		18			8				2
39 Y — itrio — [Kr] 4d¹ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹		5s²
2	8		18			9				2
40 Zr — circonio — [Kr] 4d² 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d²		5s²
2	8		18			10				2
41 Nb — niobio — [Kr] 4d⁴ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁴		5s¹
2	8		18			12				1
42 Mo — molibdeno — [Kr] 4d⁵ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁵		5s¹
2	8		18			13				1
43 Tc — tecnecio — [Kr] 4d⁵ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁵		5s²
2	8		18			13				2
44 Ru — rutenio — [Kr] 4d⁷ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁷		5s¹
2	8		18			15				1
45 Rh — rodio — [Kr] 4d⁸ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d⁸		5s¹
2	8		18			16				1
46 Pd — paladio — [Kr] 4d¹⁰
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰
2	8		18			18
47 Ag — plata — [Kr] 4d¹⁰ 5s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s¹
2	8		18			18				1
48 Cd — cadmio — [Kr] 4d¹⁰ 5s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²
2	8		18			18				2
49 In — indio — [Kr] 4d¹⁰ 5s² 5p¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p¹
2	8		18			18				3
50 Sn — estaño — [Kr] 4d¹⁰ 5s² 5p²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p²
2	8		18			18				4
51 Sb — antimonio — [Kr] 4d¹⁰ 5s² 5p³
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p³
2	8		18			18				5
52 Te — telurio — [Kr] 4d¹⁰ 5s² 5p⁴
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁴
2	8		18			18				6
53 I — yodo — [Kr] 4d¹⁰ 5s² 5p⁵
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁵
2	8		18			18				7
54 Xe — xenón — [Kr] 4d¹⁰ 5s² 5p⁶
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶
2	8		18			18				8
55 Cs — cesio — [Xe] 6s¹
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶			6s¹
2	8		18			18				8				1
56 Ba — bario — [Xe] 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶			6s²
2	8		18			18				8				2
57 La — lantano — [Xe] 5d¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰		5s²	5p⁶	5d¹		6s²
2	8		18			18				9				2
58 Ce — cerio — [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 — praseodimio — [Xe] 4f³ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f³	5s²	5p⁶			6s²
2	8		18			21				8				2
60 Nd — neodimio — [Xe] 4f⁴ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁴	5s²	5p⁶			6s²
2	8		18			22				8				2
61 Pm — prometio — [Xe] 4f⁵ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁵	5s²	5p⁶			6s²
2	8		18			23				8				2
62 Sm — samario — [Xe] 4f⁶ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁶	5s²	5p⁶			6s²
2	8		18			24				8				2
63 Eu — europio — [Xe] 4f⁷ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁷	5s²	5p⁶			6s²
2	8		18			25				8				2
64 Gd — gadolinio — [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 — terbio — [Xe] 4f⁹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f⁹	5s²	5p⁶			6s²
2	8		18			27				8				2
66 Dy — disprosio — [Xe] 4f¹⁰ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁰	5s²	5p⁶			6s²
2	8		18			28				8				2
67 Ho — holmio — [Xe] 4f¹¹ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹¹	5s²	5p⁶			6s²
2	8		18			29				8				2
68 Er — erbio — [Xe] 4f¹² 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹²	5s²	5p⁶			6s²
2	8		18			30				8				2
69 Tm — tulio — [Xe] 4f¹³ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹³	5s²	5p⁶			6s²
2	8		18			31				8				2
70 Yb — iterbio — [Xe] 4f¹⁴ 6s²
1s²	2s²	2p⁶	3s²	3p⁶	3d¹⁰	4s²	4p⁶	4d¹⁰	4f¹⁴	5s²	5p⁶			6s²
2	8		18			32				8				2
71 Lu — lutetio — [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 — hafnio — [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 — tantalio — [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 — tungsteno/wolframio — [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 — renio — [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 — osmio — [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 — iridio — [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 — platino — [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 — oro — [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 — mercurio — [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 — talio — [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 — plomo — [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 — bismuto — [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 — polonio — [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 — astato — [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 — radón — [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 — francio — [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 — radio — [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 — actinio — [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 — torio — [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 — protactinio — [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 — uranio — [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 — neptunio — [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 — plutonio — [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 — americio — [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 — curio — [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 — berkelio — [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 — californio — [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 — einstenio — [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 — fermio — [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 — mendelevio — [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 — nobelio — [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 — lawrencio — [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 — rutherfordio — [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 — dubnio — [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 — seaborgio — [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 — bohrio — [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 — hasio — [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 — meitnerio — [Rn] 5f¹⁴ 6d⁷ 7s² (predicción)
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 — darmstatio — [Rn] 5f¹⁴ 6d⁸ 7s² (predicción)
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 — roentgenio — [Rn] 5f¹⁴ 6d⁹ 7s² (predicción)
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 — copernicio — [Rn] 5f¹⁴ 6d¹⁰ 7s² (predicción)
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 Nh — nihonio — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ (predicción)
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 — flerovio — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² (predicción)
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 Mc — moscovio — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³ (predicción)
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 — livermorio — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴ (predicción)
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 Ts — teneso — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵ (predicción)
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 Og — oganesón — [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ (predicción)
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

Element of group 18 (noble gas), has a complete layer of electrons. The complete layers are called, for example, "[Ar]" for argon, etc.

Elements 119 onwards

The following are the expected electron configurations of elements 119-173 and 184. The symbol [Og] indicates the likely electron configuration of oganeson (Z = 118), which is currently the last known element. The element configurations in this table are written starting with [Og] because the oganeson is expected to be the last element above with a closed shell (inert gas) configuration, 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p ⁶. Similarly, the [172] in the configurations of elements 173 and 184 indicates the probable closed shell configuration of element 172.

Beyond element 123, no full calculations are available and therefore the data in this table should be taken as tentative. For element 123 and perhaps the other heavier elements as well, it is anticipated Several possible electronic configurations have very similar energy levels, so it is very difficult to predict the ground state. All configurations that have been proposed are included, as it is theorized that Madelung's rule will probably break here.

Predicted block assignments up to 172 are from Kulsha (2016), following the expected available valence orbitals. However, there is no consensus in the literature on how blocks after element 138 would work.

Elemento químico			Bloque	Predicción
119	Uue	Ununennio	Bloque s	[Og] 8s¹
120	Ubn	Unbinilio	Bloque s	[Og] 8s²
121	Ubu	Unbiunio	Bloque g	[Og] 8s² 8p1 1/2
122	Ubb	Unbibio	Bloque g	[Og] 8s² 8p2 1/2 [Og] 7d¹ 8s² 8p1 1/2
123	Ubt	Unbitrio	Bloque g	[Og] 6f¹ 8s² 8p2 1/2 [Og] 6f¹ 7d¹ 8s² 8p1 1/2 [Og] 6f² 8s² 8p1 1/2 [Og] 8s² 8p2 1/2 8p1 3/2
124	Ubq	Unbiquadio	Bloque g	[Og] 6f² 8s² 8p2 1/2 [Og] 6f³ 8s² 8p1 1/2
125	Ubp	Unbipentio	Bloque g	[Og] 6f⁴ 8s² 8p1 1/2 [Og] 5g¹ 6f² 8s² 8p2 1/2 [Og] 5g¹ 6f³ 8s² 8p1 1/2 [Og] 8s² 0.81(5g¹ 6f² 8p2 1/2) + 0.17(5g¹ 6f¹ 7d² 8p1 1/2) + 0.02(6f³ 7d¹ 8p1 1/2)
126	Ubh	Unbihexio	Bloque g	[Og] 5g¹ 6f⁴ 8s² 8p1 1/2 [Og] 5g² 6f² 8s² 8p2 1/2 [Og] 5g² 6f³ 8s² 8p1 1/2 [Og] 8s² 0.998(5g² 6f³ 8p1 1/2) + 0.002(5g² 6f² 8p2 1/2)
127	Ubs	Unbiseptio	Bloque g	[Og] 5g² 6f³ 8s² 8p2 1/2 [Og] 5g³ 6f² 8s² 8p2 1/2 [Og] 8s² 0.88(5g³ 6f² 8p2 1/2) + 0.12(5g³ 6f¹ 7d² 8p1 1/2)
128	Ubo	Unbioctio	Bloque g	[Og] 5g³ 6f³ 8s² 8p2 1/2 [Og] 5g⁴ 6f² 8s² 8p2 1/2 [Og] 8s² 0.88(5g⁴ 6f² 8p2 1/2) + 0.12(5g⁴ 6f¹ 7d² 8p1 1/2)
129	Ube	Unbiennio	Bloque g	[Og] 5g⁴ 6f³ 7d¹ 8s² 8p1 1/2 [Og] 5g⁴ 6f³ 8s² 8p2 1/2 [Og] 5g⁵ 6f² 8s² 8p2 1/2 [Og] 5g⁴ 6f³ 7d¹ 8s² 8p1 1/2
130	Utn	Untrinilio	Bloque g	[Og] 5g⁵ 6f³ 7d¹ 8s² 8p1 1/2 [Og] 5g⁵ 6f³ 8s² 8p2 1/2 [Og] 5g⁶ 6f² 8s² 8p2 1/2 [Og] 5g⁵ 6f³ 7d¹ 8s² 8p1 1/2
131	Utu	Untriunio	Bloque g	[Og] 5g⁶ 6f³ 8s² 8p2 1/2 [Og] 5g⁷ 6f² 8s² 8p2 1/2 [Og] 8s² 0.86(5g⁶ 6f³ 8p2 1/2) + 0.14(5g⁶ 6f² 7d² 8p1 1/2)
132	Utb	Untribio	Bloque g	[Og] 5g⁷ 6f³ 8s² 8p2 1/2 [Og] 5g⁸ 6f² 8s² 8p2 1/2
133	Utt	Untritrio	Bloque g	[Og] 5g⁸ 6f³ 8s² 8p2 1/2
134	Utq	Untriquadio	Bloque g	[Og] 5g⁸ 6f⁴ 8s² 8p2 1/2
135	Utp	Untripentio	Bloque g	[Og] 5g⁹ 6f⁴ 8s² 8p2 1/2
136	Uth	Untrihexio	Bloque g	[Og] 5g¹⁰ 6f⁴ 8s² 8p2 1/2
137	Uts	Untriseptio	Bloque g	[Og] 5g¹¹ 6f⁴ 8s² 8p2 1/2
138	Uto	Untrioctio	Bloque g	[Og] 5g¹² 6f⁴ 8s² 8p2 1/2 [Og] 5g¹² 6f³ 7d¹ 8s² 8p2 1/2
139	Ute	Untriennio	Bloque g	[Og] 5g¹³ 6f³ 7d¹ 8s² 8p2 1/2 [Og] 5g¹³ 6f² 7d² 8s² 8p2 1/2
140	Uqn	Unquadnilio	Bloque g	[Og] 5g¹⁴ 6f³ 7d¹ 8s² 8p2 1/2 [Og] 5g¹⁵ 6f¹ 8s² 8p2 1/2 8p2 3/2
141	Uqu	Unquadunio	Bloque g	[Og] 5g¹⁵ 6f² 7d² 8s² 8p2 1/2
142	Uqb	Unquadbio	Bloque g	[Og] 5g¹⁶ 6f² 7d² 8s² 8p2 1/2
143	Uqt	Unquadtrio	Bloque f	[Og] 5g¹⁷ 6f² 7d² 8s² 8p2 1/2
144	Uqq	Unquadquadio	Bloque f	[Og] 5g¹⁸ 6f² 7d² 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁷ 6f² 7d³ 8s² 8p2 1/2 [Og] 8s² 0.95(5g¹⁷ 6f² 7d³ 8p2 1/2) + 0.05(5g¹⁷ 6f⁴ 7d¹ 8p2 1/2)
145	Uqp	Unquadpentio	Bloque f	[Og] 5g¹⁸ 6f³ 7d² 8s² 8p2 1/2
146	Uqh	Unquadhexio	Bloque f	[Og] 5g¹⁸ 6f⁴ 7d² 8s² 8p2 1/2
147	Uqs	Unquadseptio	Bloque f	[Og] 5g¹⁸ 6f⁵ 7d² 8s² 8p2 1/2
148	Uqo	Unquadoctio	Bloque f	[Og] 5g¹⁸ 6f⁶ 7d² 8s² 8p2 1/2
149	Uqe	Unquadennio	Bloque f	[Og] 5g¹⁸ 6f⁶ 7d³ 8s² 8p2 1/2
150	Upn	Unpentnilio	Bloque f	[Og] 5g¹⁸ 6f⁶ 7d⁴ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f⁷ 7d³ 8s² 8p2 1/2
151	Upu	Unpentunio	Bloque f	[Og] 5g¹⁸ 6f⁸ 7d³ 8s² 8p2 1/2
152	Upb	Unpentbio	Bloque f	[Og] 5g¹⁸ 6f⁹ 7d³ 8s² 8p2 1/2
153	Upt	Unpentrio	Bloque f	[Og] 5g¹⁸ 6f¹⁰ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹¹ 7d² 8s² 8p2 1/2
154	Upq	Unpentquadio	Bloque f	[Og] 5g¹⁸ 6f¹¹ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹² 7d² 8s² 8p2 1/2
155	Upp	Unpentpentio	Bloque f	[Og] 5g¹⁸ 6f¹² 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹³ 7d² 8s² 8p2 1/2
156	Uph	Unpenthexio	Bloque f	[Og] 5g¹⁸ 6f¹³ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d² 8s² 8p2 1/2
157	Ups	Unpentseptio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d³ 8s² 8p2 1/2
158	Upo	Unpentoctio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p2 1/2
159	Upe	Unpentennio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁵ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p2 1/2 9s¹
160	Uhn	Unhexnilio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁶ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁵ 8s² 8p2 1/2 9s¹
161	Uhu	Unhexunio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁷ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁶ 8s² 8p2 1/2 9s¹
162	Uhb	Unhexbio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁸ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁷ 8s² 8p2 1/2 9s¹
163	Uht	Unhextrio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d⁹ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁸ 8s² 8p2 1/2 9s¹
164	Uhq	Unhexquadio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2
165	Uhp	Unhexpentio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s¹
166	Uhh	Unhexhexio	Bloque d	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s²
167	Uhs	Unhexseptio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s² 9p1 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p1 3/2 9s²
168	Uho	Unhexoctio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p2 3/2 9s²
169	Uhe	Unhexennio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p1 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p3 3/2 9s²
170	Usn	Unseptnilio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p2 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s²
171	Usu	Unseptunio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p3 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s² 9p1 1/2
172	Usb	Unseptbio	Bloque p	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s² 9p2 1/2
173	Ust	Unsepttrio	?	[172] 6g¹ [172] 9p1 3/2
...	...	...	...	...
184	Uoq	Unoctquadio	?	[172] 6g⁵ 7f⁴ 8d³

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Annex: Electronic configurations

Elements 1 to 118

Elements 119 onwards

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Ligand

Siderite

Uracil