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Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

explore the chemical elements through this periodic table

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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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everything for chemists: from the periodic system in online and pdf versions, to online calculators and free software for chemists. english-croatian chemistry dictionary and glossary is always at hand.

si tienes dificultades con la formulación entra en esta página. puedes repasar y hacer ejercicios que están corregidos. también puedes encontrar temas y problemas de física y química resueltos.

award winning periodic table with user-friendly element data and facts. cool online chemistry videos, dictionary, tools, etc.