
File:Radon86(1).jpg · Wikimedia Commons · See Wikimedia Commons
Also known as Rn, element 86, 86Rn
Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless. Of the three naturally occurring radon isotopes, only Rn has a sufficiently long half-life (3.825 days) for it to be released from the soil and rock where it is generated. Radon isotopes are the immediate decay products of radium isotopes.
Radon is a naturally occurring radioactive gas that is colorless and odorless, making it impossible to detect without special equipment. It is released from soil and rock into the environment and poses a health concern because of its radioactivity, which is why monitoring radon levels in homes and buildings matters.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).