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	Hydrogen is part of the Period 1 elements series, a featured 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.
	This article appeared on Wikipedia's Main Page as Today's featured article on October 29, 2006.
Article milestones Date Process Result November 8, 2004 Featured article candidate Not promoted September 18, 2005 Featured article candidate Not promoted December 20, 2005 Good article nominee Listed September 25, 2006 Featured article candidate Promoted April 20, 2008 Featured article review Kept August 16, 2008 Featured topic candidate Promoted July 31, 2014 Featured topic removal candidate Kept Current status: Featured article

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Under Properties : Isotopes : 2H : currently reads... "All deuterium in the universe is thought to have been produced at the time of the Big Bang, and has endured since that time." (as of 1418 EST on 12July2023)

I believe it should read: "Nearly all naturally occurring deuterium in the universe..." When people talk about the emissions from nuclear power plants they sometimes mention the isotopes of hydrogen that we generate and release to the public, which can include deuterium.

I generated a talk section instead of editing because I don't know the appropriate formatting. Here's hoping a more senior user can fix it!

Thanks! 216.99.180.228 (talk) 18:24, 12 July 2023 (UTC)[reply]

Done. Thanks for your suggestion. Clayoquot (talk | contribs) 01:56, 26 October 2023 (UTC)[reply]

What does tritium glow like in a tube like those shown for hydrogen and deuterium? Is it similar to deuterium? 2603:6000:8740:54B1:98C0:1879:4C99:365D (talk) 21:32, 30 August 2023 (UTC)[reply]

In this paragraph, it says explosive reactions occur between hydrogen and both air and chlorine but it goes on to say that the combustion can be triggered by a spark, heat or sunlight. This is misleading and wrong to leave it worded like this. Sunlight can only trigger combustion between hydrogen and chlorine. It cannot ignite hydrogen in air. Even a stoichiometric mixture of H2 and O2 (2 to 1) will not ignite from sunlight alone. 99.6.61.222 (talk) 00:40, 23 October 2023 (UTC)[reply]

I removed. "The explosive reactions may be triggered by spark, heat, or sunlight.", which was unsourced. Thanks for pointing this out! Clayoquot (talk | contribs) 01:50, 26 October 2023 (UTC)[reply]

Thank you! And you're very welcome! 99.6.61.222 (talk) 15:15, 26 October 2023 (UTC)[reply]

Greetings, I am a high-school amateur physicist with an interest in physical chemistry. My overall credentials include AP Physics 1, AP Physics 2, AP Chemistry, and amateur work in radiology. Thanks! Moriarty49 (talk) 21:44, 25 October 2023 (UTC)[reply]

Hi Moriarty49. Welcome! Clayoquot (talk | contribs) 23:00, 25 October 2023 (UTC)[reply]

Welcome. If you're granted access, please consider taking care of the issue I mentioned days ago right above your post. Sunlight does not ignite a hydrogen and oxygen (or air) mixture. The current editors don't seem to be interested in fixing this. 99.6.61.222 (talk) 00:29, 26 October 2023 (UTC)[reply]

I apologize for being slow on this. Addressing it now. Clayoquot (talk | contribs) 01:48, 26 October 2023 (UTC)[reply]

I am reviewing this very old FA as part of WP:URFA/2020, an effort to determine whether old featured articles still meet the featured article criteria. Last reviewed in 2008, there is considerable uncited text, the "Phases" section is only a list, Niche and evolving uses is a list, there is some overquoting, the See also section needs attention, and there may be more. Listing at WP:FARGIVEN. SandyGeorgia (Talk) 18:06, 1 November 2023 (UTC)[reply]