Talk:Diagonal relationship

How far does this "etc." go? Surely not as far as N and S! Double sharp (talk) 13:17, 29 July 2016 (UTC)

:Well, apparently, yes, as far as N and S according to Greenwood and Earnshaw: see Nitrogen#Atomic, where I added something about this particular diagonal relationship back in November 2016 (although it [https://en.wikipedia.org/w/index.php?title=User:Double_sharp/Nitrogen&oldid=751053647 wasn't yet] [https://en.wikipedia.org/w/index.php?title=Nitrogen&diff=751053805&oldid=750968460 in as much detail]). But I haven't seen anything for the O-Cl pair, and especially not the massively unlikely F-Ar pair. ^_^ Double sharp (talk) 13:54, 26 June 2019 (UTC)

We can read :"For example, Li+ is a small cation with a +1 charge and Mg2+ is somewhat larger with a +2 charge, so the charge density on each ion is roughly the same. Using the Li–Mg pair (under room temperature and pressure):"

This sentence uses apparently a very obscure idea of the term "charge density" at least it seems to be in grodd contradiction to https://en.wikipedia.org/wiki/Charge_density , since the latter type of (electronic) charge density is for sure completely different for Li^+ with its [He] configuration and Mg^(2+) with its [Ne] configuration. The term requires specification. An alternative is to use "ionic potential" or "ratio of ionic charge to ionic radius".

--141.201.140.218 (talk) 12:35, 30 July 2019 (UTC)