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Definition of Randon:
Is a chemical element that has the symbol Rn.[1]
This is the common definition for Randon, other definitions can be discussed in the article


Radon is a radioactive noble gas that is formed by the decay of radium. It is one of the heaviest gases and is considered to be a health hazard. The most stable isotope has a half-life of 3.8 days and is used in radiotherapy. Radon is a significant contaminant that affects indoor air quality worldwide. Radon gas from natural sources can accumulate in buildings and reportedly causes 21,000 lung cancer deaths per year in the United States alone.


  1. Wikipedia - Randon http://en.wikipedia.org/wiki/Radon#_note-0