Talk:Isotopes of radon

chemical and "normal" physical properties
shouldn't there also be a section in which the "regular" physical and chemical properties are outlined (boiling point, melting point etc. etc) 194.53.253.51 (talk) 09:06, 9 November 2009 (UTC)

Yes, and comes the question that, since radon is an inert gas, how do you know that there is any of it except for its radioactivity? And the second question, is there a procedure that permits us to say categorically that there are no stable isotopes of 86Rn Radon?WFPM (talk) 13:09, 8 May 2011 (UTC)
 * The main properties are at radon, though this is very late. You would be able to tell the presence of an inert gas in the same way as one would for He, Ne, and Ar; besides Rn would not be all that inert. And if there were stable isotopes of Rn, it would be quite extraordinary that stars had not synthesised them; the location of the beta-stability line cuts right through the known isotopes, which are not stable at all. The only possibility would be nuclear isomers like 180mTa, which is also really quite unlikely. Double sharp (talk) 01:11, 11 May 2017 (UTC)

Representative Isotopic Composition / Mole Fraction
222Rn is listed as "trace" in the table.

Shouldn't it be listed as > 99% (or > 0.99)? I.E. it may occur as trace quantities in nature, but most of what is found is 222Rn. Sorry, I don't have the specific percentage. Keelec (talk) 17:49, 5 May 2013 (UTC)
 * Because none of the Rn isotopes occur in anything more than traces, and those are dependent on which parent isotopes exactly happen to be there. If you have a sample with lots of thorium but almost no uranium, you will have more thoron (220Rn) than radon (222Rn). Now thoron has a low half-life (almost a minute) and so the problem is exacerbated as it has not enough time to diffuse uniformly like radon can; by the time it gets to the far corners of the room (speaking imprecisely of course), you will not have thoron, but rather its daughters. So the relative abundances fluctuate wildly depending on where exactly you are measuring them. Double sharp (talk) 15:42, 14 April 2017 (UTC)

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Unstable nuclide with N/Z = 1.5
215Rn (half-life = 2.3 µs) is the second least stable known nuclide with N:Z = 3:2, being second only to 5He. The next least stable is 275Ds (half-life = 62 µs).

Are alpha decays of 223Rn and 224Rn predicted?
Considering the short alpha half-life of 222Rn, I would be very astonished if they are not. 129.104.241.214 (talk) 02:56, 30 November 2023 (UTC)


 * The partial alpha half-life of 223Rn is 3.65 seconds (11.5 years, doi 10.1103/PhysRevC.95.014319). Nucleus hydro elemon (talk) 07:58, 1 December 2023 (UTC)
 * Thanks! As a reminder for the future in case that I forget it, this is only a calculated value. 129.104.241.214 (talk) 04:09, 3 December 2023 (UTC)

It is a pity that the isotopes of At, Rn, Fr near beta-stability line are so alpha unstable
Due to the extremely short alpha half-lives of nuclides in this region, beta decays have been so poorly studied for 212(m),213,214(m),216(m)At, 213,215,219,222Rn and 214(m),216(m),218(m)Fr. 2A04:CEC0:1088:EB77:D831:1EEE:AC25:2D1D (talk) 00:38, 14 May 2024 (UTC)