noble gas

Noun

 * 1)  Any of the elements of group 18 of the periodic table, being monatomic and (with very limited exceptions) inert.

Usage notes
When the term was coined, all known group 18 elements were unreactive gases. This may not be true for the recently discovered superheavy element oganesson, though experiments cannot yet be carried out because of its short lifetime. Chemists usually include oganesson as a noble gas to extend the term to all of group 18, though those specialising in the chemistry of superheavy elements may exclude it.

Synonyms

 * aerogen

Translations

 * Afrikaans:
 * Arabic: غَازٌ خَامِل
 * Armenian:
 * Catalan: gas noble
 * Chinese:
 * Mandarin: ,
 * Czech: vzácný plyn
 * Danish:
 * Dutch:
 * Esperanto: nobla gaso
 * Estonian: väärisgaas
 * Finnish:
 * French: ,
 * Galician:
 * German:
 * Hungarian:
 * Icelandic: eðalgas, eðalgastegund, eðallofttegund
 * Indonesian:
 * Italian:
 * Japanese:
 * Khmer: ឧស្ម័នកំរ
 * Kyrgyz: асыл газ
 * Latvian:
 * Macedonian: благороден гас
 * Malay:
 * Norwegian:
 * Persian:
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Serbo-Croatian: племенити плин, plemeniti plin
 * Slovak: vzácny plyn
 * Spanish: gas noble
 * Swedish:
 * Thai: ก๊าซมีตระกูล
 * Turkish:
 * Ukrainian: благоро́дний газ
 * Vietnamese: ,