Redirected from Electronegative
Two scales of electronegativity are in common use: the Pauling scale (proposed in 1932) and the Mulliken scale (proposed in 1934). There is also a Allred-Rochow scale.
Electronegativity decreases down the periodic table and increases across, as shown below. Additionally, atomic radius decreases across but ionization energy increase.
-> Atomic radius decreases -> Ionization energy increases -> Electronegativity increases -> | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Group | 1 | 2 | 3[?] | 4[?] | 5[?] | 6 | 7[?] | 8[?] | 9[?] | 10[?] | 11 | 12[?] | 13 | 14 | 15 | 16 | 17 | 18 | |
Period | |||||||||||||||||||
1 | H 2.1 |
He |
|||||||||||||||||
2 | Li 1.0 |
Be 1.5 |
B 2.0 |
C 2.5 |
N 3.0 |
O 3.5 |
F 4.0 |
Ne |
|||||||||||
3 | Na 0.9 |
Mg 1.2 |
Al 1.5 |
Si 1.8 |
P 2.1 |
S 2.5 |
Cl 3.0 |
Ar |
|||||||||||
4 | K 0.8 |
Ca 1.0 |
Sc 1.3 |
Ti 1.5 |
V 1.6 |
Cr 1.6 |
Mn 1.5 |
Fe 1.8 |
Co 1.9 |
Ni 1.8 |
Cu 1.9 |
Zn 1.6 |
Ga 1.6 |
Ge 1.8 |
As 2.0 |
Se 2.4 |
Br 2.8 |
Kr |
|
5 | Rb 0.8 |
Sr 1.0 |
Y 1.2 |
Zr 1.4 |
Nb 1.6 |
Mo 1.8 |
Tc 1.9 |
Ru 2.2 |
Rh 2.2 |
Pd 2.2 |
Ag 1.9 |
Cd 1.7 |
In 1.7 |
Sn 1.8 |
Sb 1.9 |
Te 2.1 |
I 2.5 |
Xe |
|
6 | Cs 0.7 |
Ba 0.9 |
Lu |
Hf 1.3 |
Ta 1.5 |
W 1.7 |
Re 1.9 |
Os 2.2 |
Ir 2.2 |
Pt 2.2 |
Au 2.4 |
Hg 1.9 |
Tl 1.8 |
Pb 1.9 |
Bi 1.9 |
Po 2.0 |
At 2.2 |
Rn |
|
7 | Fr 0.7 |
Ra 0.9 |
Lr |
Rf |
Db |
Sg |
Bh |
Hs |
Mt |
Ds |
Uuu |
Uub |
Uut |
Uuq |
Uup |
Uuh |
Uus |
Uuo |
|
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