halogen
English
Etymology
From Ancient Greek ἅλς (háls, “salt" or "sea”) + γεν- (gen-), "to produce" (coined by Berzelius in 1842).[1]
Pronunciation
- enPR: hălʹə-jən, hāʹlə-jən
- IPA(key): /ˈhæl.ə.d͡ʒən/, /ˈheɪ.lə.d͡ʒən/
Audio (Southern England) (file)
Noun
halogen (plural halogens)
- (chemistry) Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
- A light fixture in which the filament is surrounded by an atmosphere of a halogen gas.
Usage notes
When the term was coined, all known group 17 elements formed salts on reaction with a metal. This may not be true for the recently discovered superheavy element tennessine, though experiments cannot yet be carried out because of its short lifetime and the difficulty of manufacturing it. Chemists usually include tennessine as a halogen to extend the term to all of group 17, though those specializing in the chemistry of superheavy elements may exclude it.
Derived terms
Related terms
Translations
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References
- Douglas Harper (2001–2024) “halogen”, in Online Etymology Dictionary.
Catalan
Derived terms
- halogenat
- pseudohalogen
Further reading
- “halogen” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
Czech
Pronunciation
- IPA(key): [ˈɦaloɡɛn]
- IPA(key): [ˈɦaloɡɛːn]
Declension
This noun needs an inflection-table template.
Norwegian Bokmål
Etymology
From Ancient Greek ἅλς (háls, “salt" or "sea”) + -gen.
Noun
halogen n (definite singular halogenet, indefinite plural halogen or halogener, definite plural halogena or halogenene)
Norwegian Nynorsk
Etymology
From Ancient Greek ἅλς (háls) + -gen.
References
- “halogen” in The Nynorsk Dictionary.
Romanian
Adjective
halogen m or n (feminine singular halogenă, masculine plural halogeni, feminine and neuter plural halogene)
Declension
singular | plural | ||||||
---|---|---|---|---|---|---|---|
masculine | neuter | feminine | masculine | neuter | feminine | ||
nominative/ accusative | indefinite | halogen | halogenă | halogeni | halogene | ||
definite | halogenul | halogena | halogenii | halogenele | |||
genitive/ dative | indefinite | halogen | halogene | halogeni | halogene | ||
definite | halogenului | halogenei | halogenilor | halogenelor |
Welsh
Pronunciation
- (North Wales) IPA(key): /haˈlɔɡɛn/
- (South Wales) IPA(key): /haˈloːɡɛn/, /haˈlɔɡɛn/
- Rhymes: -ɔɡɛn
Noun
halogen m (plural halogenau, not mutable)
Related terms
- halid (“halide”)
References
- R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “halogen”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies