Read Edit View history 氡 dōng radon Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 氡 dōng radon the chemical element with symbol Rn; a heavy, colorless, odorless radioactive noble gas Edit Delete References Add reference same_as 氡/氡 → 镭射气/鐳射氣 Edit Delete same_as 镭射气/鐳射氣 → 氡/氡 Edit Delete
氡 dōng radon the chemical element with symbol Rn; a heavy, colorless, odorless radioactive noble gas Edit Delete