Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
Only one triad of Dobereiner's triads exists in the columns of Newlands' octaves. The triad formed by the elements Li, Na, and K of Dobereiner's triads also occurred in the columns of Newlands' octaves.
Dobereiner's triads
Li Na K
Ca Sr Br
Cl Br I
Newlands' octaves| H | Li | Be | B | C | N | O |
| F | Na | Mg | Al | Si | P | S |
| Cl | K | Ca | Cr | Ti | Mn | Fe |
| Co and Ni | Cu | Zn | Y | In | As | Se |
| Br | Rb | Sr | Ce and La | Zr | - | - |
