21. Like a dipole-induced dipole force, the charge of the ion causes distortion of the electron cloud on the non-polar molecule. 22. :: Neighboring atoms form chemical bonds with each other; this can cause the electron clouds to develop a distinctly non-spherical appearence. 23. So the electron cloud around each atomic nucleus in the paper is very slightly displaced-it is no longer centred on the nucleus. 24. All bonds basically consist of positive charged nuclei attracted to a negative charged electron cloud consisting of the " bonding electrons ". 25. Such polarization can be induced either by a polar molecule or by the repulsion of negatively charged electron clouds in non-polar molecules. 26. In this case, the aluminium ion's charge will " tug " on the electron cloud of iodine, drawing it closer to itself. 27. Magnetic scattering does require an atomic form factor as it is caused by the much larger electron cloud around the tiny nucleus. 28. In addition to this effect the anomalous scatter is more sensitive to any deviation from sphericity of the electron cloud around the atom. 29. The entire volume of any given atom is essentially all made up of the electron cloud , which is essentially impenetrable by other atoms. 30. As such, in general, cations are smaller than the corresponding parent atom or molecule due to the smaller size of its electron cloud .
