 The Photographic Periodic TableThe definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements. |  Visual Elements Periodic TableThe Royal Society of Chemistry's interactive periodic table features history, alchemy, podcasts, videos, and data trends across the periodic table. |  Dynamic Periodic TableInteractive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes and more ... |
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 Chem4KidsInformation on matter, atoms, elements, the periodic table, reactions, and biochemistry. |  The Energy in Chemical BondsSuppose I take some hydrogen gas and mix it with oxygen gas. What happens? Nothing. Nothing happens unless you add a bit of energy—from a spark, perhaps. Add energy and BOOM: You get an explosion, and the hydrogen and oxygen (some of it) make water. Clearly this reaction releases energy, but where did the energy come from? |  Periodic VideosYour ultimate channel for all things chemistry. A video about each element on the periodic table. And we upload new videos every week about science news, interesting molecules and other stuff from the world of chemistry. |
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 IUPACInternational Union of Pure and Applied Chemistry. The International Union of Pure and Applied Chemistry (IUPAC) serves to advance the worldwide aspects of the chemical sciences and to contribute to the application of chemistry in the service of Humankind. As a scientific, international, non-governmental and objective body, IUPAC can address many global issues involving the chemical sciences. |  The Path to the Periodic TableThe path to the periodic table began early in the 19th century, when John Dalton united the atomic theory of matter, which had existed in various forms since antiquity, with the concept of the chemical element, which had emerged in the late 18th century with the work of Antoine-Laurent Lavoisier and his followers. |  Antoine-Laurent LavoisierLavoisier, a meticulous experimenter, revolutionized chemistry by establishing the law of conservation of mass, determining that combustion and respiration are caused by chemical reactions with what he named "oxygen," and helping systematize chemical nomenclature, among many other accomplishments. |
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 iPad App Periodic TableThis fact-filled, image-rich app is the only periodic table you need. By Royal Society of Chemistry. |  iPad App Nova ElementsDid you ever wonder why the periodic table is shaped the way it is, what gives each element its own unique set of properties, or even how elements combine to make everyday objects such as a cup of coffee? With “NOVA Elements,” explore an interactive periodic table, play a game hosted by David Pogue, or watch the two-hour NOVA program, “Hunting the Elements.” |  iPad App Atoms HDWith the Building Atoms, Ions, and Isotopes app, explore the composition of the elements. Build atoms, ions, and isotopes by selecting appropriate numbers of protons, neutrons, and electrons. For reference, this app also includes atomic theory information and a periodic table that is interactive in the iPad version. |
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