periodic table

Theperiodic table is a chart used in chemistry that shows chemical elements in order of their atomic number. (noun)

An organized table of chemical elements such as oxygen and carbon is an example of the periodic table.

See periodic table in Webster's New World College Dictionary

an arrangement of the chemical elements according to their atomic numbers, to exhibit the periodic law

See periodic table in American Heritage Dictionary 4

noun
Chemistry

A tabular arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column.

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» Detailed and Printable Periodic Table of the Elements

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