Learn about the periodic table of the chemical elements, an ordered arrangement of the elements by atomic number and properties. Explore the history, structure, variations, trends and applications of the table in chemistry and physics.

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 even test your elements knowledge by playing a periodic table game!

Learn about the periodic table of the elements, the organized array of all the chemical elements in order of increasing atomic number. Explore the history, properties, and classification of the elements, and how they relate to the periodic law.

Interactive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.

This is an interactive periodic table of the elements showing their atomic weights, atomic numbers, electron configurations, and state at room temperature.