It is a depiction of the periodic law, which says that when the elements are arranged in order of their atomic numbers an approximate recurrence of their properties is evident. It is an icon of chemistry and is widely used in physics and other sciences. Here's how I broke mine down.The periodic table, also known as the periodic table of the elements, arranges the chemical elements into rows (" periods") and columns (" groups"). Even 4 would work fine: one for each of the s, p, d and f blocks. The colors are not critical, I just picked a layout I liked the look of, and that used all 9 colors of transparent acrylic that I could buy. Illustrator files for the nine different colors I used are attached. the diameter is slightly less than the actual vial, but greater than the thread. The hole was for a sample vial: the diameter was chosen so that the lid would trap the vial (i.e. I was initially going to include atomic weight and electronic configuration, but it made it distractingly busy. The etching indicated the atomic number, element symbol, and name. I cut 1/8" transparent acrylic of different colors into etched hexagons with holes cut in them. The STL file for the updated model is attached. Thanks to the talented Scott Daigle (current innovator-in-residence for helping me out on the CAD when I got stuck. There are some slight irregularities with the wall thicknesses, but I liked it much better than the previous design and it was much stronger and easier to assemble. The final design was basically the same, but with hexagonal punches taken out of the back of each cell to hold the acrylic panels. Most people didn't notice it, but it bugged me a LOT. when I printed it, glued it up and assembled it, I realized that the gaps between frame and acrylic panels were aesthetically, well, revolting. All steps are laid out in much more detail in my instructable " How to make accurate 3D molecular models". Making the file for printing was pretty easy: I generated an output file using TubeASP, hid all the atoms I didn't need in Mercury, and exported it for 3D printing. Eventually, I decided to just 3D print the framework. The design process went through many iterations and down various dead ends that didn't work for structural or aesthetic reasons. It's based on the structure of a chiral nanotube, and is made from a 3D printed lattice, laser cut acrylic, a lazy susan bearing, 118 sample vials and a cylindrical lamp. This instructable documents my efforts to reimagine a 3D periodic table of the elements, using modern making methods. Mendeleev got all the glory, and it is his 1869 version (dramatically updated, but still recognizable) that nearly everyone uses today. But his idea - which he called the " Telluric Spiral", because the element tellurium was near the middle - never caught on, perhaps because it was published in a geology journal unread by chemists, and because de Chancourtois failed to include the diagram and described the helix as a square circle triangle. He plotted the elements on a cylinder with a circumference of 16 units, and noted the resulting helix placed elements with similar properties in line with each other. The first periodic table was developed in 1862 by a French geologist called Alexandre-Émile Béguyer de Chancourtois.
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