详细解释:n. 氡
【化】 氡Rn
【医】 氡(86号元素), 镭射气
词型变化：
简写符号:Rn英语解释：
名词 radon:
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同义词：Rn, atomic number 86