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- The periodic table of elements can be a table which shows the arrangement of chemical elements ordered by atomic numbers in columns and rows. It was subsequently created by Russian chemist Dmitri Mendeleev in 1869 to look for the periodic trends around the properties of elements.
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The sun and rain are listed as reported by their increasing atomic numbers. Rows are arranged to the extent that elements with just one properties fall into the exact same vertical columns. The groups or columns are numbered 1-18. The arrangement is Group 1(alkali metals), Group 2(alkaline earth metals), Group 15 (pnicogens), Group 16(chalcogens), Group 17(halogens) and Group 18(noble gases). You'll find groups that enjoy non-systematic names as well. Not alone include the groups inside the periodic table, some other type of groupings of elements often named as well. They are really lanthanoids and actinoids.
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In 2006, the periodic table contained 117 periodic elements. Out the hands down, 92 are normally found naturally that is known, and what's left are artificial elements.