Electron Subshell Pyramids

See CMU Periodic Table with Electron Subshell Energy Progression
Energy increases from the 1s subshell to the 8s subshell.

                            Pyramid          Subshell                   Orbitals

8                   8s

                  7p

                  6d

                  5f

7                   7s

                  6p

                  5d

                  4f

6                   6s

                  5p

                  4d

5                   5s

                  4p

                  3d

4                   4s

                  3p

3                   3s

                  2p

2                   2s

1                   1s