atomic number 86   (TTS Sound)

The atomic_number_86 has 1 Senses.

• rn, atomic number 86, radon
• ラドン
• 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
• ラジウムの崩壊で形成された放射性ガスの要素