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Periodic table
chemistry
WRITTEN BY
J.J. Lagowski See All Contributors
Professor of Chemistry, University of Texas at Austin. Author of The Chemical Bond.
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Alternative Title: periodic table of the elements
Study chemistry's periodic law to understand elements' properties and how they relate to one another
Study chemistry's periodic law to understand elements' properties and how they relate to one another
Explanation of the periodic table.
Encyclopædia Britannica, Inc.
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Periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number—i.e., the total number of protons in the atomic nucleus. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties. The initial discovery, which was made by Dmitry I. Mendeleyev in the mid-19th century, has been of inestimable value in the development of chemistry.
periodic table
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