Schaltenbrand (1921)

[Rene]

An unusual and remarkable triangular periodic table skeleton in which the noble gases are shown in both group 0 and in group 8. It is as if the triangle wraps around.

Note the inclusion of an element "null", on the left, above helium. Consequently the period lengths are 3-9-9-19-19-33-33.

Middle "column"

The alignment of elements is:

       H

    B  C  N

    Al Si P

    

    Fe Co Ni Old school Group VIIIA

    Ru Rh Pd

    Tm Yb Lu These three are the last of the 15 Ln

H over C needs no further comment.

Al over Fe is interesting given the similarities in the chemistry of these elements (Rayner-Canham 2020, pp. 190–191).

Other connections

Al connects to Sc, as per old school chemistry (you have to draw out the whole thing to see how this works).

A related connection is that Si connects equally to Ti and to Ge.

Y connects to both La and Lu.

René

• Rayner-Canham G 2020 The Periodic Table: Past, Present, and Future, World Scientific, Singapore, pp. 190 to 191
• Schaltenbrand G 1921, Die Gliederung des periodischen Systems der Elemente, Zeitschrift Für Anorganische Und Allgemeine Chemie, vol. 115, no. 1, pp. 127–130, one citation