File:3D_image_of_Antihydrogen.jpg · Wikimedia Commons · See Wikimedia Commons
antihydrogen
Sign in to savethumb|right|upright=1.2|Antihydrogen consists of an antiproton and a [[positron]] thumb|right|upright=1.2|Simplified model of an antihydrogen atom in ground state
Wikidata facts
- Subclass of
- atom
- Mass
- 1.008
- Image
- 3D image of Antihydrogen.jpg
Show 10 more facts
- antiparticle
- hydrogen
- Commons category
- Antihydrogen
- interaction
- gravity
- atomic number
- -1
- electric charge
- 0
- electronegativity
- 2.2
- time of discovery or invention
- 1995-00-00
- location of discovery
- CERN
- discoverer or inventor
- CERN
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
Sources (3)
via Wikidata · CC0
~9 min read
Encyclopedic overview
9 sectionsContents
- Experimental history
- 1s–2s transition measurement
- Characteristics
- Production
- Low-energy antihydrogen
- Larger antimatter atoms
- See also
- References
- External links
thumb|right|upright=1.2|Antihydrogen consists of an antiproton and a [[positron]] thumb|right|upright=1.2|Simplified model of an antihydrogen atom in ground state
Antihydrogen ('''') is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may shed light on the question of why there is more matter than antimatter in the observable universe, known as the baryon asymmetry problem. Antihydrogen is produced artificially in particle accelerators.
Excerpted from Wikipedia’s “antihydrogen” article, available under the CC BY-SA 4.0 licence.