Periodic Table

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The periodic table was first developed in 1789 by Antoine Lavoisier who listed 33 known chemical elements. Since this date the table has been continually modified as new elements have been discovered, the last of which being ununquadium (114) and ununhexium (116) which were accepted in June 2011. The table now consists of 118 chemical elements, placed specifically in order to show trends. The organization of the table allows one to predict the properties of an element given its location in the table.

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