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Atomic weights change to reflect natural variations

by Hayley Birch, RSC last modified 12-20-10 02:00 AM Copyright 2010, RSC
Atomic weights change to reflect natural variations

Extract from the proposed isotopic periodic table © Chemistry International

The atomic weights for ten elements are to be expressed as intervals rather than single values, the International Union of Pure and Applied Chemistry (Iupac) has announced. The decision marks a move away from the commonly held view of atomic weight as a 'constant of nature' towards a more accurate interpretation based on naturally occurring variations in atomic weight.  More...

http://www.rsc.org/chemistryworld/News/2010/December/20121001.asp

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