Chemistry Talk

sean · Guest

I have a posted graph of element conductivity v. atomic number at this
url...

http://physicsexplained.blogspot.com/2008/07/element-conductivity_02.html

The elements are arranged by atomic numbers 1-100 in a row (shown in
the graph as a red peaked profile) rather than in a table as in the
traditional periodic table format. In my graph a pattern emerges that
does not appear obvious when arranged in the usual periodic table
layout. Particularly noticeable is the repeating structure in the red
graph seen peaking at Cu, Al, Ag and Au and also highlited above each
peak in blue. The highlited blue structure is a copy of the section of
the red graph between atomic numbers 18-32 which includes Copper and 3
other smaller peaks of Ca Co and Cr. What I show here is that the
section of the red graph around each of the 4 peaks at Cu Ag Au and
Al and their associated structures are similar in profile to the other
3.
For instance in the Copper feature on the graph there are 3 other
subsidiary peaks at Ca(20)Co(27) & Cr(24). each of these three seems
to have corresponding matches in the other sets. For instance the Ca
peak feature from the Cu set has matches in the other 3 sets of Be, Rb/
Sr and Yb. Or,... the Co feature from the Cu set has matches from the
other sets of Na/Mg,Rh and Ir.
I have compiled these into 4`subsets` as follows.

Subset 1) Cu, Al, Ag, Au
Subset 2) Ca, Be, Rb/Sr, Yb
Subset 3) Co, Na/Mg, Rh, Ir
Subset 4) Cr, -, Mo, W

I think it is very clear that the 4 main peaked structures are too
similar to be coincidental although I can see no obvious mathematical
correlation between the placing of the structures within the whole
element range. (Ie the main peaks of Cu Ag Au and Al are at atomic
numbers 47,29,79,13.)
I am interested to see if anyone had any insights into this apparent
underlying repeating structure. Or if anyone knew if each of these
above 4 subsets of elements have any other properties that are common
to that subset only. For instance do Ca,Be Rb/Sr and Yb share any
particular common property unique to that subset alone or even in
relation to the whole periodic table? ( Or any of the other 4 subsets
mentioned above.)