Астат. Самый редкий элемент.
Металл- галоген. Радиоизотопное лечение онкологии.
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![Armin van Buuren & Vini Vici feat. Anna Timofei - Sarabande [Visualizer]](https://sun9-62.userapi.com/yC0s_e1XTJFUOGGPKDzCqOXowsHED6zovzYvCA/lIeySix2J-w.jpg)