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Good article Europium has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.
August 10, 2011 Good article nominee Listed
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WikiProject Elements (Rated GA-class, Mid-importance)
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Article changed over to new Wikipedia:WikiProject Elements format by schnee. Elementbox converted 11:19, 10 July 2005 by Femto (previous revision was that of 13:44, 9 July 2005). 9 July 2005

Similar size of Eu2+ and Ba2+[edit]

This is not true. The ionic radius of Eu2+ is similar to the one of Sr2+ (e.g. for eightfold coordination: 0.126 nm for Sr2+ and 0.125 nm for Eu2+). The ionic radius of Ba2+ with eight ligands is 0.142 nm. All values are taken from the paper of Shannon. — Preceding unsigned comment added by (talk) 11:46, 23 September 2015 (UTC)

Similar hardness to lead[edit]

If so, it can't be 'moderately hard' - that's a contradiction in terms.

Information Sources[edit]

Some of the text in this entry was rewritten from Los Alamos National Laboratory - Europium. Data for the table WERE obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but was reformatted and converted into SI units.

External links modified[edit]

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Discovery vs. isolation[edit]

Europium was first observed spectroscopically in 1896, but does that not count as the discovery? The page on 1901 in science says that europium was discovered then. Other elements (helium, holmium, gadolinium, and probably some others) are listed by when they were first observed spectroscopically. Could we please have consistency with Eu? Squee3 (talk) 19:51, 28 December 2016 (UTC)

Wikipedia is not writting the history of the discovery of elements, it only reports it like it is written in books and other encyclopedias. So what do the other sources tell us? --Stone (talk) 20:57, 28 December 2016 (UTC)
They say 1896 or 1901. I don't want any articles here on the wiki changed regarding this anymore, and I would actually like this post to be deleted. Squee3 (talk) 17:00, 7 January 2017 (UTC)