Comments on: Atomic Weight Change http://www.sfsite.com/news/2010/12/17/atomic-weight-change/ Just another WordPress weblog Sun, 26 May 2013 00:11:06 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Concatenation http://www.sfsite.com/news/2010/12/17/atomic-weight-change/comment-page-1/#comment-2967 Concatenation Fri, 31 Dec 2010 15:41:31 +0000 http://www.sfsite.com/news/?p=1225#comment-2967 “fluctuation in the atomic weight of those elements”

I think you will find that atomic weights (actually mass) do not change. However they are an artificial construct of the various ‘relative atomic masses’ of the various isotopes in a sample.

The change has come about due to modern appreciation of the variations in proportions of various isotopes in samples of elements typically (on Earth) derived from the Earth’s crust.

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