Weighty decisions

Link	http://www.rsc.org/chemistryworld/2016/01/atomic-weight-ytterbium-avogadro-constant-iupac
Author	Search for: Meija, Juris¹ORCID identifier: https://orcid.org/0000-0002-3349-5535
Name affiliation	National Research Council of Canada. Measurement Science and Standards
Format	Text, Article
Subject	standard atomic weight
Abstract	Atomic weights are periodically revised as our knowledge about them changes. On average, the standard atomic weight of an element is revised every 14 years, although some take longer before a change is required. Selenium, for example, had to wait almost 80 years before its standard atomic weight was revised in 2013 by the International Union of Pure and Applied Chemistry (Iupac) Commission on Isotopic Abundances and Atomic Weights (CIAAW).
Publication date	2016-01-22
Publisher	Royal Society of Chemistry
In	Chemistry World (22 January 2016).
Language	English
Peer reviewed	Yes
NPARC number	21277319
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Record identifier	67c003e0-f711-4ebb-a3d6-df9a2aa9223c
Record created	2016-03-08
Record modified	2022-03-15