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Elements ➩ Periodic Table ➩ Electron configuration of Elements

See detailed explanation for electron configuration in atomic orbitals

Periodic Table - Electron configuration of Elements
Groups
Periods 123456789101112131415161718
1

1

H

1s

2

He

1s2
2

3

Li

1s22s

4

Be

1s22s2

5

B

1s22s22p

6

C

1s22s22p2

7

N

1s22s22p3

8

O

1s22s22p4

9

F

1s22s22p5

10

Ne

1s22s22p6
3

11

Na

[Ne]3s

12

Mg

[Ne]3s2

13

Al

[Ne]3s23p

14

Si

[Ne]3s23p2

15

P

[Ne]3s23p3

16

S

[Ne]3s23p4

17

Cl

[Ne]3s23p5

18

Ar

[Ne]3s23p6
4

19

K

[Ar]4s

20

Ca

[Ar]4s2

21

Sc

[Ar]3d4s2

22

Ti

[Ar]3d24s2

23

V

[Ar]3d34s2

24

Cr

[Ar]3d54s

25

Mn

[Ar]3d54s2

26

Fe

[Ar]3d64s2

27

Co

[Ar]3d74s2

28

Ni

[Ar]3d84s2

29

Cu

[Ar]3d104s

30

Zn

[Ar]3d104s2

31

Ga

[Ar]3d104s24p

32

Ge

[Ar]3d104s24p2

33

As

[Ar]3d104s24p3

34

Se

[Ar]3d104s24p4

35

Br

[Ar]3d104s24p5

36

Kr

[Ar]3d104s24p6
5

37

Rb

[Kr]5s

38

Sr

[Kr]5s2

39

Y

[Kr]4d5s2

40

Zr

[Kr]4d25s2

41

Nb

[Kr]4d45s

42

Mo

[Kr]4d55s

43

Tc

[Kr]4d55s2

44

Ru

[Kr]4d75s

45

Rh

[Kr]4d85s

46

Pd

[Kr]4d10

47

Ag

[Kr]4d105s

48

Cd

[Kr]4d105s2

49

In

[Cd]5p

50

Sn

[Cd]5p2

51

Sb

[Cd]5p3

52

Te

[Cd]5p4

53

I

[Cd]5p5

54

Xe

[Cd]5p6
6

55

Cs

[Xe]6s

56

Ba

[Xe]6s2

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]4f145d96s

79

Au

[Xe]4f145d106s

80

Hg

[Xe]4f145d106s2

81

Tl

[Hg]6p

82

Pb

[Hg]6p2

83

Bi

[Hg]6p3

84

Po

[Hg]6p4

85

At

[Hg]6p5

86

Rn

[Hg]6p6
7

87

Fr

[Rn]7s

88

Ra

[Rn]7s2

104

Rf

[Rn]5f146d27s2

105

Db

[Rn]5f146d37s2

106

Sg

[Rn]5f146d47s2

107

Bh

[Rn]5f146d57s2

108

Hs

[Rn]5f146d67s2

109

Mt

 

110

Ds

 

111

Rg

 

112

Cn

 

113

Nh

 

114

Fl

 

115

Mc

 

116

Lv

 

117

Ts

 

118

Og

 

57

La

[Xe]5d6s2

58

Ce

[Xe]4f5d6s2

59

Pr

[Xe]4f36s2

60

Nd

[Xe]4f46s2

61

Pm

[Xe]4f56s2

62

Sm

[Xe]4f66s2

63

Eu

[Xe]4f76s2

64

Gd

[Xe]4f75d6s2

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]4f145d6s2

89

Ac

[Rn]6d7s2

90

Th

[Rn]6d27s2

91

Pa

[Rn]5f26d7s2

92

U

[Rn]5f36d7s2

93

Np

[Rn]5f46d7s2

94

Pu

[Rn]5f67s2

95

Am

[Rn]5f77s2

96

Cm

[Rn]5f76d7s2

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]5f147s27p

Designations used in the ground shell lists:

[Ne] = 1s22s22p6
[Ar] = 1s22s22p63s23p6
[Kr] = 1s22s22p63s23p63d104s24p6
[Cd] = 1s22s22p63s23p63d104s24p64d105s2
[Xe] = 1s22s22p63s23p63d104s24p64d105s25p6
[Hg] = 1s22s22p63s23p63d104s24p64d105s25p64f145d106s2
[Rn] = 1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p6