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Petri Dish. RADON element. Noble GAS.
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Science Lab. u. USES. Radon decays into radioactive polonium and alpha particles. This emitted radiation made radon useful in cancer therapy. Radon was used in some hospitals to treat tumours by sealing the gas in minute tubes, and implanting these into the tumour , treating the disease in situ. Other, safer treatments are now more commonly used . In some places, high concentrations of radon can build up indoors, escaping from the ground or from granite buildings. Home testing kits are available which can be sent away for analysis..
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Inventory by Day. Radon is produced naturally from the decay of the isotope radium-226, which is found in rocks. It was first discovered as a radioactive gas produced from radium as it decayed. There is a detectable amount in the Earth’s atmosphere..
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Formula. BIOLOGICAL ROLE.. Radon has no known biological role. It is, however, thought that it may have had a significant role in evolution. This is because it is responsible for much of the Earth’s background radiation that can lead to genetic modifications..
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references. W . M. Haynes, ed., CRC Handbook of Chemistry and Physics , CRC Press/Taylor and Francis, Boca Raton, FL, 95th Edition, Internet Version 2015, accessed December 2014 . Tables of Physical & Chemical Constants, Kaye & Laby Online , 16th edition, 1995. Version 1.0 (2005), accessed December 2014 . J. S. Coursey , D. J. Schwab, J. J. Tsai, and R. A. Dragoset , Atomic Weights and Isotopic Compositions (version 4.1) , 2015, National Institute of Standards and Technology, Gaithersburg, MD, accessed November 2016 . T. L. Cottrell, The Strengths of Chemical Bonds , Butterworth, London, 1954 ..