Last Updated
：2025/11/19
radon
IPA(Pronunciation)
Noun
uncountable
Japanese Meaning
化学元素ラドン（原子番号86）：無臭、無色で化学的に不活性な放射性貴ガス。最も安定な同位体は²²²Rn。
Quizzes for review
The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas. / The most stable isotope of this element, ²²²₈₆Rn.
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radon
The old farmhouse had dangerously high radon levels in the basement, so we installed a mitigation system.
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The old farmhouse had dangerously high radon levels in the basement, so we installed a mitigation system.
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