Covalent radii (molecular double bond)

This gives double-bond covalent radii using specific group valencies and oxidation numbers.

Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a 3D periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular double bond) in a 3D periodic table column style.

Units

pm

Notes

This is a self-consistent system of additive covalent radii, R(AB)=r(A) + r(B), set up for the periodic table, Z = 3+112. The primary bond lengths, R, are taken from experimental or theoretical data corresponding to chosen group valencies. All elements and all admitted data points are treated as equal. Radii were then obtained self-consistently through a least-squares fit. Specific molecular coordination numbers and oxidation states are chosen for each element involved.

Select from the following links to see visual periodicity representations for atomic radii, covalent radii, and van der Waals radii. Ionic radii are also available.

Literature sources

  1. P. Pyykkö and M. Atsumi, Molecular Double-Bond Covalent Radii for Elements LiŠE112, Chem. Eur. J., 2009, 15, 12770-12779.
Explore the element of your choice through this periodic table.
1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1
H
2
He
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
55
Cs
56
Ba
 *
71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
87
Fr
88
Ra
 **
103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
 
*Lanthanoids *
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
**Actinoids **
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No