Density
9.73 g/L (at 0°C, 1 atm)
Discovery
Discovered by Friedrich Dorn in 1899.
Common Uses
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Used in some cancer treatments (radiotherapy).
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Historically used in some forms of radiation detection.
Interesting Facts
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Radon is a radioactive noble gas that forms as a decay product of radium.
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It is a significant health risk in poorly ventilated buildings where it accumulates from the ground.
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