Talk:List of stable isotopes

Pretty pregnant ?
Tellurium-128 is listed as an unstable isotope, with a half life of 2.2e24 years - is this enough to remove it from this list? Or perhaps create a section/article of "pretty stable" isotopes? Robert 16:20, 26 November 2005 (UTC)
 * Some states don't come in degrees: You are either pregnant or not. An isotope is either stable or radioactive.

There are a lot of isotopes in this list, which ARE radioactive (V-50, Ge-76, Cd-113, Cd-116, In-115, Mo-100, Gd-152, W-180, Re-187 etc...), but there are not some isotopes that were NOT observed to be radioactive (for instance, W-182, 183, 184, 186). I think it would be more useful to make a list of naturally occurred isotopes, and as a sub-set of it -- a list of stable isotopes. V1adis1av 14:15, 28 December 2005 (UTC)


 * Has it been done? If not I think we should outsource the article to an expert in isotopes and in English. Jclerman 18:28, 9 February 2006 (UTC)

Slightly pregnant ?
What do you mean by slightly radioactive?

Low level of radioactivity?

Long half-life?

Jclerman 18:19, 9 February 2006 (UTC)

All elements .., are only found in radioactive isotopes
How can you find an element in an isotope ? Jclerman 18:27, 9 February 2006 (UTC)

Are they or not ?
If Tungsten-182 Tungsten-183 Tungsten-184 Tungsten-186 are stable, edit the beginning statement. If they are not, delete. Be consistent, please. Perhaps outource this article to an expert? Jclerman 18:42, 9 February 2006 (UTC)


 * They should be alpha active but their decays had never been observed. It is only a theoretical prediction (and their predicted half-life is very-very-very long, 1050 yr or so). But for the fifth naturally occurring tungsten isotope (180W), this prediction was recently checked and its alpha decay had been observed (1018 yr, in a good agreement with theory). Many naturally occurring isotopes are considered as stable but really they are not (~65 ones should be double beta active, ~80 should be alpha active etc.). So, there are no strict border between radioactive isotopes and stable ones. And if proton is not stable (as Grand Unification Theories predict), all the isotopes are radioactive. I was in the group that had discovered the radioactivity of 180W so perhaps I can consider myself an expert in this field. --V1adis1av 20:54, 12 February 2006 (UTC)
 * Fascinating and illuminating. Thank you. Walter Siegmund (talk) 18:54, 26 July 2006 (UTC)