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 …

Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity.

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For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.

The periodic table summarizes various properties of the elements, allowing chemists to derive relationships between them and to make predictions about exceedingly transient nuclides not yet …

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 …

Jun 20, 2026 · Periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number. When the elements are thus arranged, there is a recurring pattern in …

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Zperiod is a complete interactive periodic table with 118 elements, 3D atom models, ions, chemistry tools, and worksheet practice for modern chemistry learning.