Atomic radius

to the forecast by connection conditions different atomic radii are attributed to an atom.

An absolute radius of an atom - and therefore also an absolute size - cannot be indicated so easily, since an atom does not possess a defined border after the wave-mechanical conceptions of quantum mechanics. Thusone divides the atomic radii in accordance with the different chemical binding types. The effective size of an atom determined from this permits it to compute the distance of the atomic nuclei in a given chemical compound of the respective type:

  • In predominantly ionisch developed systems ion radii are attributed to the atoms.
  • In metals the atoms receive metal radii.

Atomic radii lie in the dimension around 10,-10 m (Kovalenzradius in the hydrogen molecule 37 pm, Metal radius of twelvefold koordinierem cesium 272 pm).

see also

to literature

C. E. Mortimer, And. Mueller: Chemistry, 8. Aufl., 90f., Thieme, Stuttgart, 2003


  > German to English > (Machine translated into English)