'Isaac+Siaw'+Radon+-+Most+Reactive+&+Heaviest+Noble+Gas

All of the facts are excluding ununoctium as a Noble Gas.
 * IMPORTANT NOTICE:**

Radon is a chemical element with an atomic number of 86. It is a Noble Gas with the symbol Rn and is a naturally occurring element as part of the uranium decay chain. Radon is a radioactive element and is the second most frequent cause of lung cancer after smoking causing 21,000 lung cancer deaths per year in USA. Radon, as a Noble Gas is generally nonreactive. However, due to the trend of the Noble Gases group, Radon would be the heaviest and Most reactive Noble Gas.
 * __Radon__**

(222)g·mol−1
 * __Standard Atomic Weight__**

**__Electronic Configuration__** 4f14 5d10 6s2 6p6


 * __ Electrons per Shell __**

9.73g/L
 * __Density__**

202K / -71.15°C / -96.07°F
 * __Melting Point__**


 * __Boiling Point__**
 * 211.3K / -61.85°C / -79.1°F **

__**Isotopes**__ Although a total of 36 Radon isotopes with atomic masses ranging from 193 to 228 have been characterized, there are not any stable Radon isotopes. The most stable isotope is 222 Rn, a decay product of 226 Ra, a decay product of 238 U. It has a half-life of 3.8 days. Because of this, 222 Rn is useful as a natural tracer in Physical Sciences. Decay Chain of 238U with 222Rn highlighted in yellow There are also 3 other isotopes with a half-life of over an hour, 211 Rn, 210 Rn and 224 Rn.

1 Bq/m 3 : Shores of large oceans. 10 Bq/m 3 : Mean continental concentration in open air. 100 Bq/m 3 : Typical indoor domestic concentration. 1000 Bq/m 3 : Very high Radon concentrations, found in houses built on soils with high uranium content and/or high permeability of the ground. 7000 Bq/m 3 : Working level in Uranium mines. 100000 Bq/m 3 : Stanley Watras's( A worker in a Uranium plant who was discovered to have high Radon concentrations in his basement) Basement. 1000000 Bq/m 3 : Unventilated Uranium mines.
 * __Concentration Scale__**

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__ Data From: __ []