Electronegativities of the Elements
IA IIA IIIB - VIIIB IB IIB IIIA IVA VA VIA VIIA
H
2.2
                  
Li
1.0
 Be
1.5
       B
2.0
 C
2.5
 N
3.1
 O
3.5
 F
4.1
Na
1.0
 Mg
1.2
       Al
1.5
 Si
1.7
 P
2.1
 S
2.4
 Cl
2.8
K
0.9
 Ca
1.0
   Cu
1.8
 Zn
1.7
 Ga
1.8
 Ge
2.0
 As
2.2
 Se
2.5
 Br
2.7
Rb
0.9
       Cd
1.5
 In
1.5
 Sn
1.7
 Sb
1.8
 Te
2.0
 I
2.2
Cs
0.9
       Hg
1.4
   Pb
1.5
      

Allred-Rochow scale from J. E. Huheey, E.A. Keiter, and R. L. Keiter,
Inorganic Chemistry: Principles of Structure and Reactivity, 4th ed.,
HarperCollins, New York, 1993, pp 187-190.