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A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
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Each chemical element has a unique atomic number (Z— for "Zahl", German for "number") representing the number of protons in its nucleus. [4] Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes.
English: This pictorial periodic table is colorful, boring, and packed with information. In addition to the element's name, symbol, and atomic number, each element box has a drawing of one of the element's main human uses or natural occurrences. The table is color-coded to show the chemical groupings.
Xenon is a chemical element; it has symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas found in Earth's atmosphere in trace amounts. [ 17 ] Although generally unreactive, it can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate , the first noble gas compound to be synthesized.
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Applied Science AQA/Periodic Table; 9-1 Chemistry/The periodic table; 9-1 Chemistry/Printable version; Chemistry for Idiots, Humans and Rebels/Periodic Table of Elements; Chemistry for Idiots, Humans and Rebels/Printable version; Usage on fa.wikipedia.org کاربر:AboalfazlHosseini; Usage on fi.wikipedia.org Wikipedia:Viikon kilpailu/Viikon ...