#hydrogen
Live, measured metrics for the hashtag #hydrogen from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #hydrogen
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mastodon.social (Mastodon public tags API) · fetched 2026-09-25 21:28 UTCNo measured public usage for #hydrogen in the last 7 days. That is a real result, and a good one to know: this hashtag is wide open right now. We show a dash before we ever show a made-up number. Browse the trending index for tags with live measurements.
Related hashtags
measured · mastodon.social (Mastodon public search API) · fetched 2026-09-25 21:28 UTCNo related tags with measured usage found for #hydrogen.
Live pulse
measured · Mastodon tag timeline · fetched 2026-09-25 21:28 UTCNo recent public posts found for #hydrogen on Mastodon. Nothing measured, so nothing shown.
What “hydrogen” means
Wiktionary · Wikipediahydrogen/ˈhaɪdɹədʒ(ə)n/
- nounThe lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.
Hydrogen is a chemical element; it has the symbol H and atomic number 1. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the formula H2, called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma st
“Hydrogen” on Wikipedia (CC BY-SA) →#hydrogen across platforms
every network with a public tag surfaceFollow #hydrogen straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/hydrogen