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1.                 From The Elements (07Nov00):
                   
   
   
                   
                     
   tin
   Symbol: Sn
   Atomic number: 50
   Atomic weight: 118.69
   Silvery malleable metallic element belonging to group 14 of the periodic
   table. Twenty-six isotopes are known, five of which are radioactive.
   Chemically reactive. Combines directly with chlorine and oxygen and
   displaces hydrogen from dilute acids.