Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from write-up sources. The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements. The periodic table of the elements. The periodic table is an arrangment of the chemical elements ordered by atomic number so that periodic properties of the elements (chemical periodicity) are made clear. Short videos about every element on the periodic table, plus other cool experiments and chemistry stuff Official web site of the ITTF Para Table Tennis Committee .
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