Symbol: Rn

Atomic Number: 86

Atomic Weight: (222)

Radon (atomic number 86, symbol Rn) is a gas and chemical element that is harmful for human health. In the U.S. alone, it is the main cause for over 20 thousand lung cancer deaths annually. The gas was discovered in 1898 by Friedrich Ernst Dorn. It was first isolated in 1910 by the English chemist Robert Whytlaw-Gray and the Scottish chemist William Ramsay.

Properties and Isotopes
It is an odorless and colorless noble gas that forms as a result of the decay of uranium in water, rock, and soil. It can enter premises and residential units through cracks in the...Read More