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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 invented by Russian chemist Dmitri Mendeleev in 1869 to look for the periodic trends around the properties of elements.
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Sun and rain are listed based on their increasing atomic numbers. Rows are arranged in such a way that elements with the exact same properties set identical 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 only will be the groups during the periodic table, some other type of groupings of elements often named as well. They can be lanthanoids and actinoids.
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In 2006, the periodic table contained 117 periodic elements. Out for these, 92 are located naturally remaining, and the remaining are artificial elements.