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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). MrMeAndMrMe_Talk 02:39, 1 November 2024 (UTC)[reply]

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]

@Clayoquot: I think what you've just replaced is outdated as there are now various projects looking to utilise hydrogen found in geological features: [1] which wasn't the case 30 years ago.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]

@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]