Ground State Electron Configuration of Atoms

Atomic No. Element Configuration

1

H

1s1

2

He

1s2

3

Li

[He] 2s1

4

Be

[He] 2s2

5

B

[He] 2s22p1

6

C

[He] 2s22p2

7

N

[He] 2s22p3

8

O

[He] 2s22p4

9

F

[He] 2s22p5

10

Ne

[He] 2s22p6

11

Na

[Ne] 3s1

12

Mg

[Ne] 3s2

13

Al

[Ne] 3s23p1

14

Si

[Ne] 3s23p2

15

P

[Ne] 3s23p3

16

S

[Ne] 3s23p4

17

Cl

[Ne] 3s23p5

18

Ar

[Ne] 3s23p6

19

K

[Ar] 4s1

20

Ca

[Ar] 4s2

21

Sc

[Ar] 3d14s2

22

Ti

[Ar] 3d24s2

23

V

[Ar] 3d34s2

24

Cr

[Ar] 3d54s1

25

Mn

[Ar] 3d54s2

26

Fe

[Ar] 3d64s2

27

Co

[Ar] 3d74s2

28

Ni

[Ar] 3d84s2

29

Cu

[Ar] 3d104s1

30

Zn

[Ar] 3d104s2

31

Ga

[Ar] 3d104s24p1

32

Ge

[Ar] 3d104s24p2

33

As

[Ar] 3d104s24p3

34

Se

[Ar] 3d104s24p4

35

Br

[Ar] 3d104s24p5

36

Kr

[Ar] 3d104s24p6

37

Rb

[Kr] 5s1

38

Sr

[Kr] 5s2

39

Y

[Kr]4d15s2

40

Zr

[Kr] 4d25s2

41

Nb

[Kr] 4d45s1

42

Mo

[Kr] 4d55s1

43

Tc

[Kr] 4d55s2

44

Ru

[Kr] 4d75s1

45

Rh

[Kr] 4d85s1

46

Pd

[Kr] 4d10

47

Ag

[Kr] 4d105s1

48

Cd

[Kr] 4d105s2

49

In

[Kr] 4d105s25p1

50

Sn

[Kr] 4d105s25p2

51

Sb

[Kr] 4d105s25p3

52

Te

[Kr] 4d105s25p4

53

I

[Kr] 4d105s25p5

54

Xe

[Kr] 4d105s25p6

55

Cs

[Xe] 6s1

56

Ba

[Xe] 6s2

57

La

[Xe] 5d16s2

58

Ce

[Xe] 4f15d16s2

59

Pr

[Xe] 4f36s2

60

Nd

[Xe] 4f46s2

61

Pm

[Xe] 4f56s2

62

Sm

[Xe] 4f66s2

63

Eu

[Xe] 4f76s2

64

Gd

[Xe] 4f75d16s2

65

Tb

[Xe] 4f96s2

66

Dy

[Xe] 4f106s2

67

Ho

[Xe] 4f116s2

68

Er

[Xe] 4f126s2

69

Tm

[Xe] 4f136s2

70

Yb

[Xe] 4f146s2

71

Lu

[Xe] 4f145d16s2

72

Hf

[Xe] 4f145d26s2

73

Ta

[Xe] 4f145d36s2

74

W

[Xe] 4f145d46s2

75

Re

[Xe] 4f145d56s2

76

Os

[Xe] 4f145d66s2

77

Ir

[Xe] 4f145d76s2

78

Pt

[Xe] 4f145d96s1

79

Au

[Xe] 4f145d106s1

80

Hg

[Xe] 4f145d106s2

81

Tl

[Xe] 4f145d106s26p1

82

Pb

[Xe] 4f145d106s26p2

83

Bi

[Xe] 4f145d106s26p3

84

Po

[Xe] 4f145d106s26p4

85

At

[Xe] 4f145d106s26p5

86

Rn

[Xe] 4f145d106s26p6

87

Fr

[Rn] 7s1

88

Ra

[Rn] 7s2

89

Ac

[Rn] 6d17s2

90

Th

[Rn] 6d27s2

91

Pa

[Rn] 5f26d17s2

92

U

[Rn] 5f36d17s2

93

Np

[Rn] 5f46d17s2

94

Pu

[Rn] 5f67s2

95

Am

[Rn] 5f77s2

96

Cm

[Rn] 5f76d17s2

97

Bk

[Rn] 5f97s2

98

Cf

[Rn] 5f107s2

99

Es

[Rn] 5f117s2

100

Fm

[Rn] 5f127s2

101

Md

[Rn] 5f137s2

102

No

[Rn] 5f147s2

103

Lr

[Rn] 5f147s27p1

104

Rf

[Rn] 5f146d27s2

105

Db

[Rn] 5f146d37s2

106

Sg

[Rn] 5f146d47s2

107

Bh

[Rn] 5f146d57s2

108

Hs

[Rn] 5f146d67s2

109

Mt

[Rn] 5f146d77s2

110

Ds

[Rn] 5f146d97s1

111

Rg

[Rn] 5f146d107s1

112

Cn

[Rn] 5f146d107s2

113

[Rn] 5f146d27s27p1

114

Fl

[Rn] 5f146d27s27p2

115

[Rn] 5f146d27s27p3

116

Lv

[Rn] 5f146d27s27p4

117

[Rn] 5f146d107s27p5

118

[Rn] 5f146d107s27p6

All electron configurations in this table are from experimental determinations except for elements 103-118, which are predicted theoretically. For elements 103-118, only a few atoms can be produced at a time and it is very difficult to determine electron configurations.

 

Comments
Please use this form to report any inconsistencies, errors, or other things you would like to change about this page. We appreciate your comments. 🙂 (Note that we cannot answer questions via the google form. If you have a question, please post it on Piazza.)

License

Icon for the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

Chem 104 Summer 2024 Copyright © by Jia Zhou; John Moore; and Etienne Garand is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.