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1.                 From The Elements (07Nov00):
                   
   
   
                   
                     
   silicon
   Symbol: Si
   Atomic number: 14
   Atomic weight: 28.086
   Metalloid element belonging to group 14 of the periodic table. It is the
   second most abundant element in the Earth's crust, making up 25.7% of it
   by weight. Chemically less reactive than carbon. First identified by
   Lavoisier in 1787 and first isolated in 1823 by Berzelius.