![]() Beginning students may be thrilled to find print-your-own elements cards, as well as other periodic-table-related visual aids like Atomic Orbitals, a color-coded chart that “shows what atoms look like.” Enevoldsen further adapts his designs for home or classroom use with printable PDFs, including a version with only words and a simplified table with only pictures. We gather such facts at a glance, as well as the other endlessly useful functions of the table. Other “seemingly obscure” elements we may never have heard of, like Gallium and Tantalum, influence our daily lives “quite a bit, it turns out,” as Lacy Cooke writes at Inhabit, serving as components in LEDs and mobile phones. Rhenium, we learn, is a dense metal used in rocket engines, heater coils, and electric contacts, among other things. The non-corroding hard metal absorbs hydrogen and is used in labware, electric contacts, and dentistry. Click on Palladium, for example, and you’ll learn about its role in pollution control. The Interactive Periodic Table of the Elements, in Pictures and Words, adapts itself to different learning styles while providing students of chemistry, of all ages and levels, instant facts about each of the elements it illustrates. It’s only fitting, then, that the 21st century has its digital versions of the table, like the interactive design by Boeing software engineer Keith Enevoldsen. ![]() Mendeleev’s rudimentary beginnings have taken on new shape and have been supplemented with annotations and illustrations in eye-catching color in textbooks and on classroom walls around the world. This past March saw the 150th anniversary of his achievement, which has hardly remained a historical artifact. That’s for good reason, since the basis of the table we know today came from the design Mendeleev created in 1869. ![]() And yet, while several scientists over the course of the nineteenth century invented systems for classifying the elements, “ask most chemists who discovered the periodic table and you will almost certainly get the answer Dmitri Mendeleev,” notes the Royal Society of Chemistry. “The discovery of the periodic system for classifying the elements represents the culmination of a number of scientific developments, rather than a sudden brainstorm on the part of one individual,” writes Eric Scerri at Scientific American.
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