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Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or …

May 17, 2014 · This element list includes the names, symbols, and atomic numbers of all 118 chemical elements, arranged in order of increasing atomic number. The atomic number is the number of …

Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

Explore all 118 elements with an interactive periodic table, 3D atom models, ions, chemistry tools, and worksheet practice.

Bohr's theory was vindicated by the discovery of element 72: Georges Urbain claimed to have discovered it as the rare earth element celtium, but Bury and Bohr had predicted that element 72 …

A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).

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