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Featured articleHydrogen 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.
Good topic starHydrogen is part of the Period 1 elements series, a good topic. This is identified as among the best series of articles produced by the Wikipedia community. If you can update or improve it, please do so.
Main Page trophyThis article appeared on Wikipedia's Main Page as Today's featured article on October 29, 2006.
Article milestones
DateProcessResult
November 8, 2004Featured article candidateNot promoted
September 18, 2005Featured article candidateNot promoted
December 20, 2005Good article nomineeListed
September 25, 2006Featured article candidatePromoted
April 20, 2008Featured article reviewKept
August 16, 2008Featured topic candidatePromoted
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Current status: Featured article

Inaccurate to say hydrogen is "explosive" at 4% to 74% in air. This is its flammability range.

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Hydrogen's explosivity is listed here as 4% to 74% in air. It's more accurate to say its limit of detonability is 18% to 59%. See, for example, https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/h2_safety_fsheet.pdf, or https://en.wikipedia.org/wiki/Hydrogen_safety "inerting and purging

This should be amended in the first paragraphs of the "properties" section. Saying it is explosive at 4% gives a false impression about its risks, and feeds into a common misconception that flammability limit = detonation limit. Indeed, citation [21] refers to flammability range, and does not appear to mention explosive mixtures.51.194.9.191 (talk) 13:33, 28 February 2024 (UTC)[reply]

Mention the routes of the word Hydrogen

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Mention the routes of the word hydrogen (Hydro) from Ancient Greek: ὕδωρ, romanized: hýdōr, lit. 'water' (water) as well what caused the discoverer came up with the respective name reference (Gen) from Ancient Greek: γένος, 'birth' (meaning formation) Clearly showing the processes and reasoning of the making of the word (Water being composed of Hydrogen and Oxygen) Athan Kokkinos (talk) 04:36, 6 August 2024 (UTC)[reply]

You probably mean "roots", not "routes". The English term for word origins is "etymology". Hydrogen can be thought of as meaning "water generator" or "water origin" which is accurate in the context of burning elemental hydrogen and oxygen (2H2 + O2) produces water.71.31.145.237 (talk) 15:13, 7 August 2024 (UTC)[reply]

Where are the molecular properties?

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I figured certainly either this article would have the H-H bond distance in H2, or it would link to molecular hydrogen article. The fact that it does neither is quite disappointing.

Also I see an illustration of a spherical H atom and a cutout depicting the proton. This is really unfortunate. It should be removed. Reasons:#1 The Bohr Model is OBSOLETE, it does our readers a disservice to mention it here.#2 The sphere shows a definite surface which is misleading. The reason why the electron cloud is called a 'cloud' is because it HAS no distinct surface. #3 The surface is some UNSPECIFIED cumulative electron (charge) probability and is mostly arbitrary. Is it any more useful if it's the 80% surface? the 90%? 95%? 99%?, 99.9%? There's nothing special about the arbitrary 1.1 Angstrom diameter. #4 Atoms radii, not diameter, appears far more frequently in the chemical literature. #5 Juxtapositioning the spherical "atom" diameter in the same illustration as the much, much, much, much, much smaller proton (it can't even be shown at the same scale and that should be a good hint!) is not useful. Why not just use numbers? H radius 550 pm, proton radius 0.00085 pm (along with a note that atomic scale (and smaller) sizes strongly depend on the method, the probe, used to measure them.) 71.31.145.237 (talk) 15:46, 7 August 2024 (UTC)[reply]

Early universe and development of hydrogen

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I am wondering whether or not mention of the development of hydrogen in the early universe is lacking. Currently, there is a mention of it in the lede, where it describes at what point in time hydrogen first existed, then at what point in time electrons joined hydrogens. This is not elaborated anywhere else in the article, which I feel could be very useful, where one could include other relevant pieces of information, such as at what point molecular hydrogen first formed. Also, the mention of the formation of hydrogens' protons do not appear in its subsequent source, and is disputed to be slightly longer than that (see Big Bang nucleosynthesis, although perhaps the article could be referring to the creation of protons, and not nucleosynthesis? It is not clear). MrMeAndMrMeTalk 02:39, 1 November 2024 (UTC)[reply]

Plural

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H, C and O, if referring to hydrogen, carbon, and oxygen; should be pluralized as H's, C's, and O's (with apostrophes); as opposed to Hs, Cs, and Os (no apostrophes); to avoid confusion with Hs = hassium, Cs = cesium, and Os = osmium. The fact that hassium is an unstable, artificial element which has never been procured in macroscopic amounts, doesn't mean that clarity isn't compromised by the absence of said apostrophe. I remember, a chemistry book which was available online for free as a PDF, did said plurals without an apostrophe; which annoyed me. Solomonfromfinland (talk) 03:02, 31 December 2024 (UTC)[reply]

I found no such usage in this article. Johnjbarton (talk) 04:01, 14 January 2025 (UTC)[reply]

White / gold / natural hydrogen

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@Clayoquot: I think what you've just replaced is outdated as there are now various projects looking to utilise hydrogen found in geological features: [1] which wasn't the case 30 years ago. That's not the best of sources to use here, but we should include the info somewhere. I see a brief mention in Hydrogen#Terrestrial but that's not the best source either. SmartSE (talk) 20:01, 15 January 2025 (UTC)[reply]

We have natural hydrogen which is linked, but only in the lead (as dihydrogen) and the see also. SmartSE (talk) 20:09, 15 January 2025 (UTC)[reply]

Carrier business

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@Clayoquot: So H2 is not a fuel, it is a carrier. Also, from energy carrier, we read "carriers include springs, electrical batteries, capacitors, pressurized air, dammed water, hydrogen, petroleum, coal, wood, and natural gas." That seems to about wrap it up for combustable stuff (surprise: they are definitely not fuels!).

What we are trying to convey in this article is not whether H2 is a fuel or a carrier, but that a large effort is dedicated to what one might call "H2 carriers" (carriers of carriers?). Engineers like H2 as a not-fuel-fuel because it burns cleanly and it can be made from abundant resources (water). But engineers dislike H2 as a not-fuel-fuel because it is not readily condensed or stored. So engineers have dedicated much effort to systems that are carriers for H2, which are H-rich materials that are reversibly release H2 on demand. So, we have a predicament that editors might help with: on one hand we have the nomenclaturists who insist that H2 is a carrier, and on the other hand we have engineers who are trying to solve problems, not with nomenclature, but with energy, and they are focused on carriers for H2.

Hope that makes sense. --Smokefoot (talk) 21:30, 15 January 2025 (UTC)[reply]

Yup, I hear you and Smartse. I've got some ideas for making everyone happy... but I also just got handed a new task at work so I won't be able to flesh things out yet. I'll self-revert for now and will come back to this in a few days. Cheers, Clayoquot (talk | contribs) 23:05, 15 January 2025 (UTC)[reply]