Re: Peroidic Table (was exclusion principle which was electrons)

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Ahh -- the distance of outer electrons in high Z electrons from the
nucleus is so great the effect of the distribution of charge in the
nucleus is far field determined.  However, I think only the noble gasses
have a spherical charge distribution.  This is shown by the Ramsauer -
Townsend effect.  Incidentally, it's rather weak in He and very strong
in Xe.

bc, one of whose more favoured experiments is the R-T and performed it
last week for some Modern Physics students

Larry Cartwright wrote:

> Charles Bell wrote:
>
>
> > Uranium atoms are football shaped, not round.
> > I remember from the liquid drop model that Uranium and Plutonium and other
> > transuranics are football shaped and that when they absorb a neutron they
> > fission when the ends bulge out and form asymetrical smaller drops.
> > Diameter might not be  good parameter.
>
> Uranium *nuclei* (as well as the nuclei of other Lanthanides and
> Actinides) are "football shaped" prolate spheroids according to the
> Bohr-Wheeler liquid drop model.
>
> The shape of the uranium *atom* is determined by the outer electron
> shells and is as nearly spherical as smaller atoms.  Diameter should be
> as meaningful a parameter for uranium *atoms* as it is for smaller
> atoms.
>
> Best wishes,
>
> Larry
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Larry Cartwright               Retired Physics Teacher
> <exit60@cablespeed.com>        Charlotte MI 48813 USA
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> "Information is not knowledge,
> knowledge is not wisdom,
> and wisdom is not foresight.
> Each grows out of the other and we need them all."
>                                    (Arthur C. Clarke)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~