radon
The chemical element with atomic number 86The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
» Several measurements show high radon levels in this area.
ebob52 · Tatoeba · CC BY 2.0 FRMeaning
3 senses(uncountable)The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
Radon
радо́нradón
радо́нradón
The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
(countable)An atom of this element.
(uncountable)Radon-222 (22286Rn), the most stable isotope of said element.
- a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
Examples
3 sentencesSeveral measurements show high radon levels in this area.
How much radon is there?
Helium, neon, argon, krypton, xenon and radon are noble gases.
ruГелий, неон, аргон, криптон, ксенон и радон - благородные газы. — Balamax
deHelium, Neon, Argon, Krypton, Xenon und Radon sind Edelgase. — Esperantostern
Translations
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Forms
plural: radonsSynonyms
7 synonyms- a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health:Rnatomic number 86
Word family
9 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable