→ Atomic radius decreases → Ionization potential increases → Electronegativity increases →
Group
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
Period
H
He
1
2.20
Li Be
B C N O F Ne
2
0.98 1.57
2.04 2.55 3.04 3.44 3.98
Na Mg
Al Si P
S Cl Ar
3
0.93 1.31
1.61 1.90 2.19 2.58 3.16
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
4
0.82 1.00 1.36 1.54 1.63 1.66 1.55 1.83 1.88 1.91 1.90 1.65 1.81 2.01 2.18 2.55 2.96 3.00
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
5
0.82 0.95 1.22 1.33 1.6 2.16 1.9 2.2 2.28 2.20 1.93 1.69 1.78 1.96 2.05 2.1 2.66 2.6
Cs Ba * Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
6
0.79 0.89
1.3 1.5 2.36 1.9 2.2 2.20 2.28 2.54 2.00 1.62 2.33 2.02 2.0 2.2
Fr Ra ** Rf Db Sg Bh Hs Mt Ds Rg Uub Uut Uuq Uup Uuh Uus Uuo
7
0.7 0.9
Lanthanides
Actinides
*
La
1.1
** Ac
1.1
Ce
1.12
Th
1.3
Pr
1.13
Pa
1.5
Nd
1.14
U
1.38
Pm
1.13
Np
1.36
Sm
1.17
Pu
1.28
Eu
1.2
Am
1.13
Gd
1.2
Cm
1.28
Tb
1.1
Bk
1.3
Dy
1.22
Cf
1.3
Ho
1.23
Es
1.3
Er
1.24
Fm
1.3
Tm
1.25
Md
1.3
Periodic table of electronegativity using the Pauling scale
See also Periodic table
http://en.wikipedia.org/wiki/Electronegativity
Yb
1.1
No
1.3
Lu
1.27
Lr
1.3
Electronegativity trends
Each element has a characteristic electronegativity ranging from 0 to 4 on the Pauling scale. The most strongly electronegative
element, fluorine, has an electronegativity of 3.98 while weakly electronegative elements, such as lithium, have values close to 1. The
least electronegative element is francium at 0.7. In general, the degree of electronegativity decreases down each group and increases
across the periods, as shown below. Across a period, non-metals tend to gain electrons and metals tend to lose them due to the atom
striving to achieve a stable octet. Down a group, the nuclear charge has less effect on the outermost shells. Therefore, the most
electronegative atoms can be found in the upper, right hand side of the periodic table, and the least electronegative elements can be
found at the bottom left. Consequently, in general, atomic radius decreases across the periodic table, but ionization potential increases.
http://en.wikipedia.org/wiki/Electronegativity