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You can find all sorts of periodic table formulations HERE. It is quite interesting. Check it out!

Yes, Block 'g' also fits the same pattern beginning with element No. 121. Only it would make ADOMAH PT 18 elements (or 9 units) taller. You are absolutely right. There is the relationship of the sizes of the sub shells to the size of the tetrahedron. The tetrahedron shown on http://www.perfectperiodictable.com site has edge equal to 9 units. Therefore, there could be only 4 rectangles possible (if only prime numbers are used): 1x8 (s-block), 3x6 (p-block), 5x4(d-block) and 7x2(f-block). There could be no other rectangles possible, given that only prime numbers are used. (green slices also assume the same dimensions if the tetrahedron edge is odd number, only in opposite order). Now, try to make edge of the tetrahedron E=10 units long. We would have following combinations, for "red" slices (spaced 2 units appart as measured along the edges): 1x9 (s-block), 3x7 (p-block), 5x5(d-block), 7x3(f-block) and 9x1(g-block), These are the "red layers", representing the blocks. The green layers would be 8x2, 6x4, 4x6 and 2x8 (just spacers, or matrix, or, perhaps the neutrons within the nucleus). You can see that g-block is 18 elements long (where 1 unit is a pair of elements). If edge is E=11 units, then red layers would be: 1x10 (s-block), 3x8(p), 5x6(d), 7x4(f) and 9x2(block-g, 18 element tall, total of 36 elemets). Therefore, if tetrahedron has edge "E" and rectangles have sides "a" and "b", where side "a" is always odd and "b" can be either even or odd, the dimensions of the subshell blocks follow rule: a + b = E (using only prime numbers). Number of slices, or sub shells: NOS = E/2 with no reminder. All other blocks, such as 'h', 'i', 'j' ... can also be derived in the same manner by making tetrahedron edge E = 12, 13, 14, 15, 16, 17 ... units. This is not a coincidence: The Periodic Law can be completely understood in terms of the tetrahedral geometry.

Check out ADOMAH PT, the only periodic table that allows direct reading of the primary quantum number "n" for all periods and strictly follows all four quantum numbers n, l, ml and ms, as well as the Madelung Rule: http://www.perfectperiodictable.com While there, please click on "3D Concept" and the "User's Guide". It is quite revealing ! P.S. It is also listed at http://www.meta-synthesis.com/webbook/35_pt/pt.html#ADOMAH among other most interesting formulations.

Hi there: I love discussions about the Periodic Table the History of Science in general and Chemistry in particular. I hope to find to make friends here, so I can chat about those subjects. I'll see you !