Covalent radii (molecular single bond)

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

Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a periodic table cityscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a spiral periodic table heatscape style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a 3D spiral periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular single bond) in a 3D periodic table column style.
Image showing periodicity of the chemical elements for covalent radii (molecular single 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), is set up for the entire periodic table, Groups 1+18, Z = 1+118. 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 Single-Bond Covalent Radii for Elements 1118, Chem. Eur. J., 2009, 15, 186-197.
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