Periodic table | Definition, Elements, Groups, Charges, Trends,
https://www.britannica.com/science/periodic-table
WEB6 days ago · periodic table, 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 ...
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