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Just discovered that this article is in British English. So I have set the infobox |engvar=en-GB accordingly (to show vapour, vaporise, colour). Phosphorus is the other one in en-GB. -DePiep (talk) 17:58, 16 December 2014 (UTC) To be clear: the element name is & stays 'caesium' by IUPAC definition. -DePiep (talk) 17:59, 16 December 2014 (UTC)