Talk:2719: Hydrogen Isotopes

This shows as a 404 on xkcd.com but in my RSS feed i can see the comic

Works for me. 172.69.34.9 02:25, 3 January 2023 (UTC)

works for me now too but it didnt before

It works on m.xkcd.com and on the homepage of xckd, but the direct link gives me a 404. Various services such as the Wayback Machine show it as loading though. Could be a bad cache on some service. 162.158.63.86 02:37, 3 January 2023 (UTC)

Could someone add an explanation of Nydnonen? I don't get it and it's google proof 172.71.210.209 05:04, 3 January 2023 (UTC)Benzodiakanine

Nothing. Was hopeful about List of Greek and Latin roots in English/N but nope. Tried stemming on all the Wiktionaries too. 172.71.158.91 05:28, 3 January 2023 (UTC)

Kudos to whomever figured it out, lol! 172.71.158.231 08:02, 3 January 2023 (UTC)

Seems someone already did. There are four N's in that word replacing three of the consonant in Hydrogen so there are now four Ns one for each of the four neutrons in Nydnonen. ;-) --Kynde (talk) 08:10, 3 January 2023 (UTC)

Are these to scale? I recently read that the Helium is smaller in terms of measured atomic radius than the Hydrogen. Possibly this is true of Deuterium as well? 172.70.85.45 06:50, 3 January 2023 (UTC)

They are almost the same size but it depends on temperature: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.200800063 162.158.90.153 08:00, 3 January 2023 (UTC)

Is the reason Helium is smaller not that there are double the positive charge which the electrons thus orbit in a lower orbit (I know this is not the correct in reality with the orbit). But if true then Deuterium would not have this effect as it is not the weight but the charge that changes the orbit. And Deuterium has the same charge as Hydrogen as does Tritium. --Kynde (talk) 08:10, 3 January 2023 (UTC)

Is "oops all neutrons" distinct from Neutronium, which is also all neutrons? 172.70.100.131 07:38, 3 January 2023 (UTC)

Neutronium is ultra-dense and bound by gravity, with a minimum of about 1.2x10⁵⁸ neutrons in a 40 kilometer diameter sphere. 162.158.90.153 08:00, 3 January 2023 (UTC)

Well actually a neutron star is only 10 km in radius (20 km in diameter) according to Wikipedia. And it is 10⁵⁷ neutrons acording to this lecture on Neutron Stars. Neutronium was actually used as a name for neutrons without protons and suggested to be placed as number 0 on the periodical table. But is has also been used as a name for the matter in the center of neutron stars, but usually not in scientific papers! There it is called degenerate matter. The wiki article mentions how a single neutron decays to proton/electron/neutrino in 15 minutes. It also mentions that two neutrons could form for very short periods in nuclear decay. An then mentions that more than two neutrons together is not likely to exist. Specifically mentioning the three from Randall's Oops particle as not being stable for even the shortest of times. Of course a neutron would also not be able to orbit a group of neutrons. But even the three at the center is impossible. More neutrons together would be isotopes of number 0 element... --Kynde (talk) 08:22, 3 January 2023 (UTC)

I think "Maximum Strength" is a reference to medicines marketed as such - in particular brands of Ibuprofen "Maximum Strength Tablets". --172.69.79.132 14:59, 3 January 2023 (UTC)