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Re: Mass



On Wednesday, Oct 20, 2004, at Edmiston, Mike wrote (in part):


(5) Depending on how the NIST experiments turn out, we may end up
defining the standard kilogram as a certain number of atoms (probably
of
silicon).

Why Si and not C-12, as it is now, in chemistry? Silicon, like oxygen,
has three stable isotopes.
Ludwik Kowalski