Talk:Hydrogen

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Featured article Hydrogen is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so.
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Expansion on hydrogen fusion[edit]

@David Condrey: recently added the following material to the article [1]. I don't think I object to the addition in principle (although i haven't reviewed the material in full), but it's very poorly formatted at the moment, and brings the quality of this Featured Article down. I've included the material below, so it can be edited / tightened, and debated:

Flammable or Inflammable Air[edit]

This article mentions Cavendish calling his discovery of hydrogen as "flammable air". Everywhere else that I've seen that talks about Cavendish and phlogiston theory, uses the term "inflammable air." 75.150.48.86 (talk) 16:45, 26 March 2015 (UTC)

inflammable is here [2], but following the usage notes here [[3]] it is flammable to prevent confusion.Mion (talk) 18:09, 26 March 2015 (UTC)
In this context the article is describing the history of hydrogen specifically what Cavendish named his discovery. It seems to improper to change the words he used. The wikipedia page on Cavendish [[4]] uses the term "inflammable air".72.219.204.154 (talk) 23:33, 31 March 2015 (UTC)

Hydrogen as element vs. hydrogen as molecule[edit]

This article is confusing, it mixes element, and molecule. I think it should be splited up like in Spanish wikipedia (Hidrógeno/Dihidrógeno), and other elements that are not found free (O,O2,O3). It would be hard to students get the difference if you put it in the same article and jump to one and to another without saying so.

Some differences:

Property Applies to H Applies to H2
Symbol YesH No
Formula YesH YesH2
Name YesHydrogen (element/atoms) YesDihydrogen/Hydrogen gas
Atomic number Yes No
Mass Yes (atomic mass=~1) Yes (molar mass=~2)
Found free on Earth No, found bonded to same (=>H2) or other elements (=>H2O, H4C, etc.) Yes
Form compounds Yes No
Eloy (talk) 21:49, 2 April 2015 (UTC)
I would still recommend that this article covers basic information about the molecule. But more detailed information could go into another page called dihydrogen or hydrogen molecule. We already do have a more detailed article on Hydrogen atom and the exotic trihydrogen. Graeme Bartlett (talk) 05:30, 19 May 2015 (UTC)
Other information missing includes physical properties such as viscosity, thermal conduction, electrical conduction, critical point, dielectric constant, density over a range of pressures - phase diagram, magnetic properties. Hydrogen as an atmosphere in a star or a planet has much written on the topic, and should have an article linked. This leads to wanting to know its appearance in bulk, and in different conditions. Other uses missing are NMR itself, and manufacture of margarine. So perhaps some should go in here and some in other article(s) on the molecule. Graeme Bartlett (talk) 21:35, 20 May 2015 (UTC)

Minor cleanup[edit]

While looking through our older FAs, I noticed a few minor issues here. I fixed a bare url in the references, and removed an external link that no longer functioned. Appreciate if someone would take a shot at replacing the 4 deadlinks, and eliminating unnecessary "See also" links (many of them are already linked within the article, some quite prominently). Thanks. Maralia (talk) 04:40, 19 May 2015 (UTC)

I've also added a few {{better source}} tags, and a handful of {{full citation needed}} tags. Will try to help out with these. Maralia (talk) 15:06, 19 May 2015 (UTC)

I have addressed and fixed all these issues. And removed an undue section on xylose. Graeme Bartlett (talk) 22:05, 20 May 2015 (UTC)
Great work—thank you Graeme! Maralia (talk) 22:45, 20 May 2015 (UTC)