Electronegativity And Bond Polarity

Electronegativity

Atom	Electronegativity
F	4.0
O	3.5
N, Cl	3.0
Br	2.8
C, S, I	2.5
Se, Au	2.4
Ru, Rh, Pd, Os, Ir, Pt, At	2.2
H, Te	2.1
B, As, Po	2.0
Co, Ni, Cu, Tc, Ag, Sb, Re, Hg, Pb, Bi	1.9
Si, Fe, Ge, Mo, Tl	1.8
Cd, In, W	1.7
V, Cr, Zn, Ga, Nb	1.6
Be, Al, Ti, Mn, Ta	1.5
Zr, Pa, U	1.4
Np-No	1.4-1.3
Sc, Hf, Th	1.3
Mg, Y	1.2
La-Lu	1.0-1.2
Ac	1.1
Li, Ca, Sr	1.0
Na, Ba, Ra	0.9
K, Rb	0.8
Cs, Fr	0.7
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When you feel comfortable with the above chart, try Electronegativity 2.

 

Bond	Electronegativity Difference	Bond Polarity
H-H	0.0	nonpolar
O-O	0.0	nonpolar
C-C	0.0	nonpolar
N-N	0.0	nonpolar
H-S	0.4
H-C	0.4
C-N	0.5
C-Cl	0.5
N-O	0.5
Cl-O	0.5
Br-O	0.7
H-Cl	0.9
H-N	0.9
S-O	1.0
C-O	1.0
Cu-Cl	1.1
Fe-Cl	1.2
H-O	1.4
P-O	1.4
Zn-Cl	1.4
Al-Cl	1.5
Mg-Cl	1.8
H-F	1.9
Ca-Cl	2.0
Na-Cl	2.1
K-Cl	2.2
Mg-O	2.3
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Reference: pp.300-301 "Chemistry" by Steven S. Zumdahl, D.C. Heath and Company, 1986 (ISBN=0-669-04529-2).