Elements, topology, and T-shirts
  Consider the network of elements connected by adjacency in atomic number and periodic table column. If all elements except H-He are connected by identical springs and constrained to a z-spiral in 2D, a map sans spring-crossing results for various values of rest length in units of the H-He distance. If the z-spiral is removed, and the network allowed to relax in 3D, the resulting surface with three holes has the topology of a T-shirt or open-handle teapot. Mapping this to a shirt's front-back pattern yields a 2D table of elemental inter-connects in tabular (nearly rectilinear) form. Sample applications: The flat spiral (like other spiral patterns) might serve as basis for an educational board game, while the T-shirt table might serve as a starting point for ``topologically informed'' classroom periodic-table design projects with wearable awards. 
P. Fraundorf