Periodic table (electron configurations)

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Electron configurations of the neutral gaseous atoms in the ground state.

1s:

 1
H

1

 2
He

2

[He]
+
2s:
2p:

 3
Li

1
-

 4
Be

2
-

 5
B

2
1

 6
C

2
2

 7
N

2
3

 8
O

2
4

 9
F

2
5

 10
Ne

2
6

[Ne]
+
3s:
3p:

 11
Na

1
-

 12
Mg

2
-

 13
Al

2
1

 14
Si

2
2

 15
P

2
3

 16
S

2
4

 17
Cl

2
5

 18
Ar

2
6

[Ar]
+
4s:
3d:
4p:

 19
K

1
-
-

 20
Ca

2
-
-

 21
Sc

2
1
-

 22
Ti

2
2
-

 23
V

2
3
-

 24
Cr

1
5
-

 25
Mn

2
5
-

 26
Fe

2
6
-

 27
Co

2
7
-

 28
Ni

2
8
-

 29
Cu

1
10
-

 30
Zn

2
10
-

 31
Ga

2
10
1

 32
Ge

2
10
2

 33
As

2
10
3

 34
Se

2
10
4

 35
Br

2
10
5

 36
Kr

2
10
6

[Kr]
+
5s:
4d:
5p:

 37
Rb

1
-
-

 38
Sr

2
-
-

 39
Y

2
1
-

 40
Zr

2
2
-

 41
Nb

1
4
-

 42
Mo

1
5
-

 43
Tc

2
5
-

 44
Ru

1
7
-

 45
Rh

1
8
-

 46
Pd

-
10
-

 47
Ag

1
10
-

 48
Cd

2
10
-

 49
In

2
10
1

 50
Sn

2
10
2

 51
Sb

2
10
3

 52
Te

2
10
4

 53
I

2
10
5

 54
Xe

2
10
6

[Xe]
+
6s:
4f:
5d:
6p:

 55
Cs

1
-
-
-

 56
Ba

2
-
-
-

 57
La

2
-
1
-

 58
Ce

2
1
1
-

 59
Pr

2
3
-
-

 60
Nd

2
4
-
-

 61
Pm

2
5
-
-

 62
Sm

2
6
-
-

 63
Eu

2
7
-
-

 64
Gd

2
7
1
-

 65
Tb

2
9
-
-

 66
Dy

2
10
-
-

 67
Ho

2
11
-
-

 68
Er

2
12
-
-

 69
Tm

2
13
-
-

 70
Yb

2
14
-
-

 71
Lu

2
14
1
-

 72
Hf

2
14
2
-

 73
Ta

2
14
3
-

 74
W

2
14
4
-

 75
Re

2
14
5
-

 76
Os

2
14
6
-

 77
Ir

2
14
7
-

 78
Pt

1
14
9
-

 79
Au

1
14
10
-

 80
Hg

2
14
10
-

 81
Tl

2
14
10
1

 82
Pb

2
14
10
2

 83
Bi

2
14
10
3

 84
Po

2
14
10
4

 85
At

2
14
10
5

 86
Rn

2
14
10
6

[Rn]
+
7s:
5f:
6d:
7p:

 87
Fr

1
-
-
-

 88
Ra

2
-
-
-

 89
Ac

2
-
1
-

 90
Th

2
-
2
-

 91
Pa

2
2
1
-

 92
U

2
3
1
-

 93
Np

2
4
1
-

 94
Pu

2
6
-
-

 95
Am

2
7
-
-

 96
Cm

2
7
1
-

 97
Bk

2
9
-
-

 98
Cf

2
10
-
-

 99
Es

2
11
-
-

 100
Fm

2
12
-
-

 101
Md

2
13
-
-

 102
No

2
14
-
-

 103
Lr

2
14
-
1

 104
Rf

2
14
2
-

 105
Db

 
 
 
 

 106
Sg

 
 
 
 

 107
Bh

 
 
 
 

 108
Hs

 
 
 
 

 109
Mt

 
 
 
 

 110
Ds

 
 
 
 

 111
Rg

 
 
 
 

 112
Uub

 
 
 
 

 113
Uut

 
 
 
 

 114
Uuq

 
 
 
 

 115
Uup

 
 
 
 

 116
Uuh

 
 
 
 

 117
Uus

 
 
 
 

 118
Uuo

 
 
 
 
  • Configurations of elements with light gray background are uncertain or not available.
  • Grayed out electron numbers indicate subshells that are filled to their maximum.

Configurations that are unavailable are guessed to be similar to the element directly above on the Periodic Table.

  • The bracketed noble gas symbols on the left represent the inner configurations that are the same in each period. Written out these are:
He, 2, helium : 1s2
Ne, 10, neon : 1s2 2s2 2p6
Ar, 18, argon : 1s2 2s2 2p6 3s2 3p6
Kr, 36, krypton : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
Xe, 54, xenon : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6
Rn, 86, radon : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6
Uuo, 118, Ununoctium : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6
  • Note the non-linear shell ordering, which comes about due to the different energies of smaller and larger shells.

References

electron configurations of the elements (data page)

v • d • e
Periodic tables
Layouts
Lists of elements by
Groups
1 (Alkalis) · 2 (Alkaline earths) · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 (Pnictogens) · 16 (Chalcogens) · 17 (Halogens) · 18 (Noble gases)
Periods:
1 · 2 · 3 · 4 · 5 · 6 · 7 · 8
Other element categories
Blocks

Wikipedia content modification information:

  • This page was last modified on 30 October 2008, at 01:38.

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