The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements.

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Award winning periodic table, with user-friendly element data and facts. Cool, online chemistry videos, dictionary, tools and forum.

Chem4s.com! This tutorial introduces the periodic table. Other sections include matter, elements, reactions, and biochemistry.

Periodic table of elements with information on chemical elements like gold, silver, iron, neon, helium, chlorine, copper, cobalt, and more

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[Detailed data] Interactive periodic table. Including melting point, density, element history and crustal and oceanic abundance.

group: in chemistry, a set of chemical elements in the same vertical column of the periodic table. The elements in a group have similarities in the electronic

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An up-to-date periodic table with detailed but easy to understand information

Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions

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A group or family is a vertical column in the periodic table. Groups usually have more significant periodic trends than periods and blocks, explained below.

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Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses, geologic

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