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Electronegativity And Bond Polarity

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Updated 2009-04-04 15:53

Electronegativity

AtomElectronegativity
F4.0
O3.5
N, Cl3.0
Br2.8
C, S, I2.5
Se, Au2.4
Ru, Rh, Pd, Os, Ir, Pt, At2.2
H, Te2.1
B, As, Po2.0
Co, Ni, Cu, Tc, Ag, Sb, Re, Hg, Pb, Bi1.9
Si, Fe, Ge, Mo, Tl1.8
Cd, In, W1.7
V, Cr, Zn, Ga, Nb1.6
Be, Al, Ti, Mn, Ta 1.5
Zr, Pa, U1.4
Np-No1.4-1.3
Sc, Hf, Th1.3
Mg, Y1.2
La-Lu1.0-1.2
Ac1.1
Li, Ca, Sr1.0
Na, Ba, Ra0.9
K, Rb0.8
Cs, Fr0.7
memorize

 

When you feel comfortable with the above chart, try Electronegativity 2.

 

BondElectronegativity DifferenceBond Polarity
H-H0.0nonpolar
O-O0.0nonpolar
C-C0.0nonpolar
N-N0.0nonpolar
H-S0.4
H-C0.4
C-N0.5
C-Cl0.5
N-O0.5
Cl-O0.5
Br-O0.7
H-Cl0.9
H-N0.9
S-O1.0
C-O1.0
Cu-Cl1.1
Fe-Cl1.2
H-O1.4
P-O1.4
Zn-Cl1.4
Al-Cl1.5
Mg-Cl1.8
H-F1.9
Ca-Cl2.0
Na-Cl2.1
K-Cl2.2
Mg-O2.3
memorize

 

Reference: pp.300-301 "Chemistry" by Steven S. Zumdahl, D.C. Heath and Company, 1986 (ISBN=0-669-04529-2).