atomic number 85   (TTS Sound)

The atomic_number_85 has 1 Senses.

• astatine, atomic number 85, at
• アスタチン
• a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
• 非常に不安定な放射性元素（ハロゲン系で最も重い）