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    radon

    radon - 365bet中国官方网站 definition and meaning for word radon

    Definition
    (noun) 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
    Synonyms : atomic number 86 , rn

  • Word used in video below:
    text: the sixth noble gas uh radon
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