Electronegativity (Allen)

L.C. Allen suggests that electronegativity is the average one-electron energy of the valence shell electrons in the ground state free atoms. This means that values of the Allen electronegativity can be calculated from spectroscopic data. The values obtained correlate well with Pauling electronegativity and with Allred-Rochow electronegativity. The Allen electronegativity is given the symbol Χspec.

Image showing periodicity of the chemical elements for electronegativity (Allen) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a 3D periodic table column style.
Image showing periodicity of the chemical elements for electronegativity (Allen) in a 3D periodic table column style.

Units

Pauling scale

Notes

The Allen electronegativity is given the symbol Χspec. For the s- and p-block elements, then:

Χspec = (mεs + nεp)/(m + n)

where

  • m = number of s-electrons
  • n = number of p-electrons
  • εp = p ionization energy
  • εs = s ionization energy

You can look at visual representations of the various electronegativity scales using the following links.

Literature sources

  1. L.C. Allen, J. Am. Chem. Soc., 1989, 111, 9003.
  2. J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
Explore the element of your choice through this periodic table.
1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1
H
2
He
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
55
Cs
56
Ba
 *
71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
87
Fr
88
Ra
 **
103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
 
*Lanthanoids *
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
**Actinoids **
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No