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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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Should we add this theoretical element before hydrogen? I feel like we should. The article is here: Elements Wiki And well as here: Neutronium... HumorousZR (talk) 02:35, 15 November 2013 (UTC)

lifting gas[edit]

"it was once widely used as a lifting gas in balloons and airships"

As far as I know, the use of hydrogen as lifting gas has been increasing in recent years; the weather balloon lift gas market is estimated to be $200 million per year, and with helium becoming more expensive, helium users are switching to hydrogen. There are over a 1000 sites worldwide that do routine meteorological balloon/weather balloon launches, at least twice daily (at 0000 UTC and 1200 UTC). That's 750,000 launches per year for basic observations by the civil meteorological sector alone. Lifting gas application may seem of historical importance only, but replacing weather balloons with other technology would be much more difficult and costly than replacing the airships a century ago. Ssscienccce (talk) 00:05, 7 November 2013 (UTC)
Aldo prob basicly true that there is a shift to hydrogen coz of the helium costs, all currents sources only leed to a media hyped company which did 1 news release [[1]], we need an additional source about the size of the weather balloon market, maybe you can find one ? Cheers Mion (talk) 00:21, 7 November 2013 (UTC)


The article has almost no information about the molecule. What are its dimensions? What is its spectrum? How much energy to break it apart? All we have is information about the spin isomers. I find it hard to believe that this is a featured article with such incomplete coverage of the topic. There is not even a picture of the molecule. We could have hydrogen molecule or dihydrogen as a separate article rather than redirects as this article is big enough. Graeme Bartlett (talk) 02:21, 8 December 2013 (UTC)

Expansion on hydrogen fusion[edit]

@David Condrey: recently added the following material to the article [2]. 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:

Possible addition[edit]

There are two distinct reactions in which 4 H atoms may eventually result in one He atom. The first of these is:[1][2]

1.i) 1H + 1H 2D + e+ + ν
1.ii) 2D + 1H 3He + γ
1.iii) 3He + 3He 4He + 1H + 1H

This reaction sequence is believed to be the most important one in the solar core. The total energy released by these reactions in turning 4 Hydrogen atoms into 1 Helium atom is 26.7 MeV. The second reaction generate less than 10% of the total solar energy. This involves carbon atoms which are not consumed in the overall process. The details of this "carbon cycle" are as follows:

2.i) 12
+ 1H 13N + γ
2.ii) 13
13C + e+ + ν
2.iii) 13
+ 1H 14N + γ
2.iv) 14
+ 1H 150 + γ
2.v) 15
15N + e+ + ν 15
+ 1H 12C + 4He + γ


  1. ^ McDonald, A.; Kennewell, J. (2014). "The Source of Solar Energy". Bureau of Meteorology. Retrieved 28 August 2014. 
  2. ^ Ehrenfreund, P.; Irvine, W.; Owen, T.; Becker, L.; Blank, J.; Brucato, J.; Colangeli, L.; Derenne, S.; Dutrey, A.; Despois, D.; Lazcano, A.; Robert, F., eds. (2004). Astrobiology: Future Perspectives. Kluwer Academic Publishers. ISBN 978-1-4020-2304-0. 


Add comments here. Headbomb {talk / contribs / physics / books} 06:02, 29 August 2014 (UTC)