Andy Dingley wrote:
On Fri, 6 Jan 2006 15:40:36 -0500, "Mr. Bla" wrote:


Simply adding molecular weights or even their atomic number is not a method
of determining density.


It is for gases though (to a good approximation)

Maybe beryllium is gaseous on your planet ? It would work then.

I was about to mention the same thing. :-)
...lew...