Hydrogen (disambiguation)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up hydrogen in Wiktionary, the free dictionary.
Hydrogen is the chemical element with symbol H and atomic number 1.
Hydrogen may also refer to:
- Dihydrogen, an allotrope of hydrogen
- Hydrogen atom, about the physics of atomic hydrogen
- Hydrogen ion
- Hydron (chemistry), a.k.a. "proton" or "hydrogen"
- Isotopes of hydrogen
- Hydrogen-2 (deuterium)
- Hydrogen-3 (tritium)
- Hydrogen-4
- Hydrogen-5
Other things named "hydrogen"[edit]
- Hydrogen (horse), a champion Australian Thoroughbred racehorse
- Hydrogen (software), drum machine software
See also[edit]
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
Wikimedia Commons has media related to hydrogen.