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History of the Periodic Table: Difference between revisions
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* There are ninety elements in the periodic table that are found in nature, the rest are man-made. | * There are ninety elements in the periodic table that are found in nature, the rest are man-made. | ||
* Most of the elements in the periodic table are metals | * Most of the elements in the periodic table are metals. | ||
* The main difference between Mendeleev's periodic table and the modern periodic table is that Mendeleev's table has the elements arranged by increasing atomic weight, and the modern periodic table has the elements arranged by increasing atomic number. | * The main difference between Mendeleev's periodic table and the modern periodic table is that Mendeleev's table has the elements arranged by increasing atomic weight, and the modern periodic table has the elements arranged by increasing atomic number. | ||
* The first element to be made artificially was Technetium. <ref>ThoughtCo. [https://www.thoughtco.com/important-periodic-table-facts-608854 10 Periodic Table Facts] ''ThoughtCo''. Accessed May 21, 2017.</ref> | * The first element to be made artificially was Technetium. <ref>ThoughtCo. [https://www.thoughtco.com/important-periodic-table-facts-608854 10 Periodic Table Facts] ''ThoughtCo''. Accessed May 21, 2017.</ref> | ||
