Talk:Selenium/GA1

GA Review
The edit link for this section can be used to add comments to the review.''

Reviewer: Pyrotec (talk · contribs) 13:35, 12 June 2012 (UTC)


 * I will review. Pyrotec (talk) 13:35, 12 June 2012 (UTC)

Initial comments
I'm done an initial quick read of the article. On this basis, it looks a very strong contender for GA; and I would expect to be awarding GA at the end of this review. Having said that, I've not yet checked any of the references, so there may be some corrective actions - we will see. Pyrotec (talk) 15:53, 14 June 2012 (UTC)

I'm now reviewing the article against WP:WIAGA section by section, starting from Characteristics and then doing the WP:Lead last. Here I will be mostly highlighting "problems", so a section that is OK is likely to have few comments here. There will be an overall summary at the end of the review. Pyrotec (talk) 16:19, 14 June 2012 (UTC)


 * Characteristics -
 * Physical properties -
 * Appears compliant. I had a look at one of my old course books (Cotton & Wilkinson, 3rd ed, 1972) - Se8 made by evaporation of solutions below 72 C, stable gray form can be grown from hot solutions of Se in aniline or from melts: worth mentioning?


 * Isotopes & Occurrence -
 * These two subsections appear to be compliant.

Pyrotec (talk) 18:13, 15 June 2012 (UTC)


 * History -
 * ✅ Pyrotec (talk) - Ref 21 (Trofast, Jan. Berzelius' Discovery of Selenium) has not been fully cited. The article comes from a journal, which has a publisher, journal title, volume & no., date of publication, pages and ISSN: none of these are given in the citation.
 * ✅ Pyrotec (talk) - Ref 28 (The need for selenite and molybdate in the formation of formic dehydrogenase by members of the Coli-aerogenes group of bacteria. 57. 1954.) has not been fully cited. The article comes from a journal, which has a personal author, journal title, and page numbers: none of these are given in the citation.
 * Otherwise OK.


 * Production -
 * Appears compliant.


 * Chemical compounds -
 * Chalcogen compounds -
 * The text appears to contradict itself in respect of SeO3: i.e. "Selenium forms two stable oxides: selenium dioxide (SeO2) and selenium trioxide (SeO3). .... Unlike sulfur, which forms a stable trioxide, selenium trioxide is unstable and decomposes to the dioxide above 185 °C". I suspect that the problem lies in the wording of the "Unlike sulfur, ..." sentence.
 * ✅ SO3 is stable, but SeO3 isn't. I've fixed it. Double sharp (talk) 15:47, 16 June 2012 (UTC)
 * There is no mention of how selenium trioxide is made (I looked it up and also when it was first prepared - 1930, by the way).
 * ✅ Would that be enough? Double sharp (talk) 15:47, 16 June 2012 (UTC)
 * ✅ Pyrotec (talk) - The equation: "3 Se + 4 HNO3 → 3 H2SeO3 + 4 NO" is balanced for Se and N but not H and O; there appears to be one molecule of water missing.


 * Halogen compounds -
 * I find the wikilink on the two chemical compounds visually distracting. I would prefer the link to be on Selenium monochloride and Sulfuryl chloride with the chemical formulas afterwards. It has been done below for "(sulfur hexafluoride), SeF6", why the inconsistency?
 * ✅ Double sharp (talk) 15:47, 16 June 2012 (UTC)

...stopping for now. To be continued. Pyrotec (talk) 19:24, 15 June 2012 (UTC)
 * In passing, I've completed refs. 21 and 28 and the HNO3 reaction (water is also missing in the source book), though don't expect much from me on more time-consuming issues :-). Materialscientist (talk) 01:22, 16 June 2012 (UTC)
 * Thanks Materialscientist. Pyrotec (talk) 13:45, 16 June 2012 (UTC)


 * Selenides -
 * The reaction: "Al2Se3 + 6 H2O → 8 Al2O3 + H2Se" is clearly wrong (or perhaps the vandals have struck?).
 * ✅ Double sharp (talk) 16:06, 16 June 2012 (UTC)


 * Other compounds -
 * I find the wikilink on the chemical compound S4N4 visually distracting. I would prefer the link to be on its proper name Tetrasulfur tetranitride with the chemical formula afterwards. It has been done below for "(sulfur hexafluoride), SeF6", why the inconsistency?
 * ✅ Double sharp (talk) 16:06, 16 June 2012 (UTC)


 * Organoselenium compounds -
 * Looks OK.


 * Applications -
 * Ref 54 (^ Davis, Joseph R. (2001). %7C page 278 Copper and Copper Alloys. ISBN 978-0-87170-726-0.) is strangely cited. It's a book, but the publisher is not cited; the page number appears to be 278, but its not clear what the "%7C page 278" means.
 * ✅ Double sharp (talk) 16:11, 16 June 2012 (UTC)
 * Refs 58, 59, 60 and 66 are books, but the publishers are not cited.


 * Biological role -

...stopping for now. To be continued. Pyrotec (talk) 15:08, 16 June 2012 (UTC)
 * I'm not sure I understand "2 GSH + H2O2GSH-Px → GSSG + 2 H2O". The equation "2 GSH + H2O2 → GSSG + 2 H2O" seems to make more sense and its almost identical to the equation in Glutathione peroxidase.
 * Otherwise, OK.


 * WP:Lead -
 * Looks OK.

Pyrotec (talk) 08:27, 17 June 2012 (UTC)

Overall summary
GA review – see WP:WIAGA for criteria


 * 1) Is it reasonably well written?
 * A. Prose quality:
 * B. MoS compliance for lead, layout, words to watch, fiction, and lists:
 * 1) Is it factually accurate and verifiable?
 * A. References to sources:
 * Well referenced.
 * B. Citation of reliable sources where necessary:
 * Well referenced.
 * C. No original research:
 * 1) Is it broad in its coverage?
 * A. Major aspects:
 * B. Focused:
 * 1) Is it neutral?
 * Fair representation without bias:
 * 1) Is it stable?
 * No edit wars, etc:
 * 1) Does it contain images to illustrate the topic?
 * A. Images are copyright tagged, and non-free images have fair use rationales:
 * B. Images are provided where possible and appropriate, with suitable captions:
 * 1) Overall:
 * Pass or Fail:
 * No edit wars, etc:
 * 1) Does it contain images to illustrate the topic?
 * A. Images are copyright tagged, and non-free images have fair use rationales:
 * B. Images are provided where possible and appropriate, with suitable captions:
 * 1) Overall:
 * Pass or Fail:
 * 1) Overall:
 * Pass or Fail:
 * Pass or Fail:

I'm awarding this article GA status. Having looked at other chemical/element articles, such as Oxygen which is now an FA, I suspect that Selenium could in due course become a strong candidate for WP:FAC. Congratulations on a fine article. Pyrotec (talk) 08:27, 17 June 2012 (UTC)