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periodic table

noun
- 1. a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
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Periodic table
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows and columns. It is an icon of chemistry and is widely used in physics and other sciences. It is a depiction of the periodic law, which states that when the elements are arranged in order of their atomic numbers an approximate recurrence of their properties is evident. ... Wikipedia
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