"alphaQuad" <alp### [at] earthlinknet> wrote:
>
> last 3 rows had unavailable data and a default 200 pm was used

I'll say!  Some of those post-actinoids are known by something like 3 or 4
atoms in a cloud chamber, and have half-lives of a few milliseconds.  Need
to get the caliper in there real fast!  Two of them (Uuh and Uuo) were even
imaginary, making measurements even more difficult.  (Look up "Victor Ninov"
for more about this creative alchemy.)

As far as i can tell, Uus hasn't even been discovered yet; and Uud, Uuh,
Uuo, Uup, Uuq, and Uut are still in the process of verification, since their
atoms decay literally faster than they can be detected.  I imagine that
quantum mechanics can predict their atomic radii, but that may be a
pointless exercise.

I don't know why the lanthanoids' data would be missing (especially
considering that francium's wasn't missing!), but i'd imagine that their
radii would be similar to lanthanum's.  Considering this, and looking at
Alain's data, your lanthanum atom looks way too small.  What value did you
have for that?

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