Some useful common electronegativities are:
H 2.1
Li 1.0 | Be 1.5 | B 2.0 | C 2.5 | N 3.0 | O 3.5 | F 4.0
Na 0.9 | Mg 1.2 | Al 1.5 | Si 1.8 | P 2.1 | S 2.5 | Cl 3.0
K 0.8 | Ca 1.0 | Ga 1.6 | Ge 1.8 | As 2.0 | Se 2.4 | Br 2.8
Rb 0.8 | Sr 1.0 | In 1.7 | Sn 1.8 | Sb 1.9 | Te 2.1 | I 2.5
Cs 0.7 | Ba 0.9 | Tl 1.8 | Pb 1.9 | Bi 1.9 | Po 2.0 | At 2.2
Elemental numbers for these elements are available on the
Periodic Table of the Elements.