Electronegativity of Chemical Elements

Periodic Table of Elements - electronegativity
1
H

Hydrogen

2.2

2
He

Helium

Unknown

3
Li

Lithium

0.98

4
Be

Beryllium

1.57

5
B

Boron

2.04

6
C

Carbon

2.55

7
N

Nitrogen

3.04

8
O

Oxygen

3.44

9
F

Fluorine

3.98

10
Ne

Neon

Unknown

11
Na

Sodium

0.93

12
Mg

Magnesium

1.31

13
Al

Aluminium

1.61

14
Si

Silicon

1.9

15
P

Phosphorus

2.19

16
S

Sulfur

2.58

17
Cl

Chlorine

3.16

18
Ar

Argon

Unknown

19
K

Potassium

0.82

20
Ca

Calcium

1.0

21
Sc

Scandium

1.36

22
Ti

Titanium

1.54

23
V

Vanadium

1.63

24
Cr

Chromium

1.66

25
Mn

Manganese

1.55

26
Fe

Iron

1.83

27
Co

Cobalt

1.88

28
Ni

Nickel

1.91

29
Cu

Copper

1.9

30
Zn

Zinc

1.65

31
Ga

Gallium

1.81

32
Ge

Germanium

2.01

33
As

Arsenic

2.18

34
Se

Selenium

2.55

35
Br

Bromine

2.96

36
Kr

Krypton

3.0

37
Rb

Rubidium

0.82

38
Sr

Strontium

0.95

39
Y

Yttrium

1.22

40
Zr

Zirconium

1.33

41
Nb

Niobium

1.6

42
Mo

Molybdenum

2.16

43
Tc

Technetium

1.9

44
Ru

Ruthenium

2.2

45
Rh

Rhodium

2.28

46
Pd

Palladium

2.2

47
Ag

Silver

1.93

48
Cd

Cadmium

1.69

49
In

Indium

1.78

50
Sn

Tin

1.96

51
Sb

Antimony

2.05

52
Te

Tellurium

2.1

53
I

Iodine

2.66

54
Xe

Xenon

2.6

55
Cs

Caesium

0.79

56
Ba

Barium

0.89

57-71

 

Lanthanoids

 

72
Hf

Hafnium

1.3

73
Ta

Tantalum

1.5

74
W

Tungsten

2.36

75
Re

Rhenium

1.9

76
Os

Osmium

2.2

77
Ir

Iridium

2.2

78
Pt

Platinum

2.28

79
Au

Gold

2.58

80
Hg

Mercury

2.0

81
Tl

Thallium

1.62

82
Pb

Lead

2.33

83
Bi

Bismuth

2.02

84
Po

Polonium

2.0

85
At

Astatine

2.2

86
Rn

Radon

Unknown

87
Fr

Francium

0.7

88
Ra

Radium

0.9

89-103

 

Actinoids

 

104
Rf

Rutherfordium

Unknown

105
Db

Dubnium

Unknown

106
Sg

Seaborgium

Unknown

107
Bh

Bohrium

Unknown

108
Hs

Hassium

Unknown

109
Mt

Meitnerium

Unknown

110
Ds

Darmstadtium

Unknown

111
Rg

Roentgenium

Unknown

112
Cn

Copernicium

Unknown

113
Nh

Nihonium

Unknown

114
Fl

Flerovium

Unknown

115
Mc

Moscovium

Unknown

116
Lv

Livermorium

Unknown

117
Ts

Tennessine

Unknown

118
Og

Oganesson

Unknown

57
La

Lanthanum

1.1

58
Ce

Cerium

1.12

59
Pr

Praseodymium

1.13

60
Nd

Neodymium

1.14

61
Pm

Promethium

Unknown

62
Sm

Samarium

1.17

63
Eu

Europium

Unknown

64
Gd

Gadolinium

1.2

65
Tb

Terbium

Unknown

66
Dy

Dysprosium

1.22

67
Ho

Holmium

1.23

68
Er

Erbium

1.24

69
Tm

Thulium

1.25

70
Yb

Ytterbium

Unknown

71
Lu

Lutetium

1.27

89
Ac

Actinium

1.1

90
Th

Thorium

1.3

91
Pa

Protactinium

1.5

92
U

Uranium

1.38

93
Np

Neptunium

1.36

94
Pu

Plutonium

1.28

95
Am

Americium

1.3

96
Cm

Curium

1.3

97
Bk

Berkelium

1.3

98
Cf

Californium

1.3

99
Es

Einsteinium

1.3

100
Fm

Fermium

1.3

101
Md

Mendelevium

1.3

102
No

Nobelium

1.3

103
Lr

Lawrencium

Unknown

Electronegativity of Chemical Elements

Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons towards this atom. For this purposes, a dimensionless quantity the Pauling scale, symbol χ, is the most commonly used.

electronegativity - periodic tableIn general, an atom’s electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it. The most electronegative atom, fluorine, is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7. Electronegativity is related with ionization energy and electron affinity. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. Therefore the electronegativity is greatest at the top-right of the periodic table and decreases toward the bottom-left.

electron affinity and electronegativity

Properties of other elements