The Janet Periodic Table was first published in 1929. This table may be re-arranged as a series of four square matrices. Each matrix is a different size. I believe that square matrices are important in physics.

If each cell of each matrix is represented as a cube, the matrices may then be stacked vertically. The result resembles a "stepped pyramid" having four levels. This gives a three dimensional periodic table. The structure relates any cube (cell) to a unique set of quantum numbers, which may also identify a "location" within the structure.

The quantum numbers of any element also defines its location within the 3D table. I wonder if the energy of a `most significant electron` may be related to its location and if subtle properties of elements may be revealed by this 3D table.